3eb15f72ac092bc98cce5c9bdc04387fa62f21a1
[linux-2.6.git] / drivers / media / video / vino.c
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  * v4l2_device/v4l2_subdev conversion by:
13  * Copyright (C) 2009 Hans Verkuil <hverkuil@xs4all.nl>
14  *
15  * Note: this conversion is untested! Please contact the linux-media
16  * mailinglist if you can test this, together with the test results.
17  */
18
19 /*
20  * TODO:
21  * - remove "mark pages reserved-hacks" from memory allocation code
22  *   and implement fault()
23  * - check decimation, calculating and reporting image size when
24  *   using decimation
25  * - implement read(), user mode buffers and overlay (?)
26  */
27
28 #include <linux/init.h>
29 #include <linux/module.h>
30 #include <linux/delay.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/errno.h>
33 #include <linux/fs.h>
34 #include <linux/interrupt.h>
35 #include <linux/kernel.h>
36 #include <linux/slab.h>
37 #include <linux/mm.h>
38 #include <linux/time.h>
39 #include <linux/version.h>
40 #include <linux/kmod.h>
41
42 #include <linux/i2c.h>
43
44 #include <linux/videodev2.h>
45 #include <media/v4l2-device.h>
46 #include <media/v4l2-ioctl.h>
47 #include <linux/mutex.h>
48
49 #include <asm/paccess.h>
50 #include <asm/io.h>
51 #include <asm/sgi/ip22.h>
52 #include <asm/sgi/mc.h>
53
54 #include "vino.h"
55 #include "saa7191.h"
56 #include "indycam.h"
57
58 /* Uncomment the following line to get lots and lots of (mostly useless)
59  * debug info.
60  * Note that the debug output also slows down the driver significantly */
61 // #define VINO_DEBUG
62 // #define VINO_DEBUG_INT
63
64 #define VINO_MODULE_VERSION "0.0.6"
65 #define VINO_VERSION_CODE KERNEL_VERSION(0, 0, 6)
66
67 MODULE_DESCRIPTION("SGI VINO Video4Linux2 driver");
68 MODULE_VERSION(VINO_MODULE_VERSION);
69 MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
70 MODULE_LICENSE("GPL");
71
72 #ifdef VINO_DEBUG
73 #define dprintk(x...) printk("VINO: " x);
74 #else
75 #define dprintk(x...)
76 #endif
77
78 #define VINO_NO_CHANNEL                 0
79 #define VINO_CHANNEL_A                  1
80 #define VINO_CHANNEL_B                  2
81
82 #define VINO_PAL_WIDTH                  768
83 #define VINO_PAL_HEIGHT                 576
84 #define VINO_NTSC_WIDTH                 640
85 #define VINO_NTSC_HEIGHT                480
86
87 #define VINO_MIN_WIDTH                  32
88 #define VINO_MIN_HEIGHT                 32
89
90 #define VINO_CLIPPING_START_ODD_D1      1
91 #define VINO_CLIPPING_START_ODD_PAL     15
92 #define VINO_CLIPPING_START_ODD_NTSC    12
93
94 #define VINO_CLIPPING_START_EVEN_D1     2
95 #define VINO_CLIPPING_START_EVEN_PAL    15
96 #define VINO_CLIPPING_START_EVEN_NTSC   12
97
98 #define VINO_INPUT_CHANNEL_COUNT        3
99
100 /* the number is the index for vino_inputs */
101 #define VINO_INPUT_NONE                 -1
102 #define VINO_INPUT_COMPOSITE            0
103 #define VINO_INPUT_SVIDEO               1
104 #define VINO_INPUT_D1                   2
105
106 #define VINO_PAGE_RATIO                 (PAGE_SIZE / VINO_PAGE_SIZE)
107
108 #define VINO_FIFO_THRESHOLD_DEFAULT     16
109
110 #define VINO_FRAMEBUFFER_SIZE           ((VINO_PAL_WIDTH \
111                                           * VINO_PAL_HEIGHT * 4 \
112                                           + 3 * PAGE_SIZE) & ~(PAGE_SIZE - 1))
113
114 #define VINO_FRAMEBUFFER_COUNT_MAX      8
115
116 #define VINO_FRAMEBUFFER_UNUSED         0
117 #define VINO_FRAMEBUFFER_IN_USE         1
118 #define VINO_FRAMEBUFFER_READY          2
119
120 #define VINO_QUEUE_ERROR                -1
121 #define VINO_QUEUE_MAGIC                0x20050125
122
123 #define VINO_MEMORY_NONE                0
124 #define VINO_MEMORY_MMAP                1
125 #define VINO_MEMORY_USERPTR             2
126
127 #define VINO_DUMMY_DESC_COUNT           4
128 #define VINO_DESC_FETCH_DELAY           5       /* microseconds */
129
130 #define VINO_MAX_FRAME_SKIP_COUNT       128
131
132 /* the number is the index for vino_data_formats */
133 #define VINO_DATA_FMT_NONE              -1
134 #define VINO_DATA_FMT_GREY              0
135 #define VINO_DATA_FMT_RGB332            1
136 #define VINO_DATA_FMT_RGB32             2
137 #define VINO_DATA_FMT_YUV               3
138
139 #define VINO_DATA_FMT_COUNT             4
140
141 /* the number is the index for vino_data_norms */
142 #define VINO_DATA_NORM_NONE             -1
143 #define VINO_DATA_NORM_NTSC             0
144 #define VINO_DATA_NORM_PAL              1
145 #define VINO_DATA_NORM_SECAM            2
146 #define VINO_DATA_NORM_D1               3
147
148 #define VINO_DATA_NORM_COUNT            4
149
150 /* I2C controller flags */
151 #define SGI_I2C_FORCE_IDLE              (0 << 0)
152 #define SGI_I2C_NOT_IDLE                (1 << 0)
153 #define SGI_I2C_WRITE                   (0 << 1)
154 #define SGI_I2C_READ                    (1 << 1)
155 #define SGI_I2C_RELEASE_BUS             (0 << 2)
156 #define SGI_I2C_HOLD_BUS                (1 << 2)
157 #define SGI_I2C_XFER_DONE               (0 << 4)
158 #define SGI_I2C_XFER_BUSY               (1 << 4)
159 #define SGI_I2C_ACK                     (0 << 5)
160 #define SGI_I2C_NACK                    (1 << 5)
161 #define SGI_I2C_BUS_OK                  (0 << 7)
162 #define SGI_I2C_BUS_ERR                 (1 << 7)
163
164 /* Internal data structure definitions */
165
166 struct vino_input {
167         char *name;
168         v4l2_std_id std;
169 };
170
171 struct vino_clipping {
172         unsigned int left, right, top, bottom;
173 };
174
175 struct vino_data_format {
176         /* the description */
177         char *description;
178         /* bytes per pixel */
179         unsigned int bpp;
180         /* V4L2 fourcc code */
181         __u32 pixelformat;
182         /* V4L2 colorspace (duh!) */
183         enum v4l2_colorspace colorspace;
184 };
185
186 struct vino_data_norm {
187         char *description;
188         unsigned int width, height;
189         struct vino_clipping odd;
190         struct vino_clipping even;
191
192         v4l2_std_id std;
193         unsigned int fps_min, fps_max;
194         __u32 framelines;
195 };
196
197 struct vino_descriptor_table {
198         /* the number of PAGE_SIZE sized pages in the buffer */
199         unsigned int page_count;
200         /* virtual (kmalloc'd) pointers to the actual data
201          * (in PAGE_SIZE chunks, used with mmap streaming) */
202         unsigned long *virtual;
203
204         /* cpu address for the VINO descriptor table
205          * (contains DMA addresses, VINO_PAGE_SIZE chunks) */
206         unsigned long *dma_cpu;
207         /* dma address for the VINO descriptor table
208          * (contains DMA addresses, VINO_PAGE_SIZE chunks) */
209         dma_addr_t dma;
210 };
211
212 struct vino_framebuffer {
213         /* identifier nubmer */
214         unsigned int id;
215         /* the length of the whole buffer */
216         unsigned int size;
217         /* the length of actual data in buffer */
218         unsigned int data_size;
219         /* the data format */
220         unsigned int data_format;
221         /* the state of buffer data */
222         unsigned int state;
223         /* is the buffer mapped in user space? */
224         unsigned int map_count;
225         /* memory offset for mmap() */
226         unsigned int offset;
227         /* frame counter */
228         unsigned int frame_counter;
229         /* timestamp (written when image capture finishes) */
230         struct timeval timestamp;
231
232         struct vino_descriptor_table desc_table;
233
234         spinlock_t state_lock;
235 };
236
237 struct vino_framebuffer_fifo {
238         unsigned int length;
239
240         unsigned int used;
241         unsigned int head;
242         unsigned int tail;
243
244         unsigned int data[VINO_FRAMEBUFFER_COUNT_MAX];
245 };
246
247 struct vino_framebuffer_queue {
248         unsigned int magic;
249
250         /* VINO_MEMORY_NONE, VINO_MEMORY_MMAP or VINO_MEMORY_USERPTR */
251         unsigned int type;
252         unsigned int length;
253
254         /* data field of in and out contain index numbers for buffer */
255         struct vino_framebuffer_fifo in;
256         struct vino_framebuffer_fifo out;
257
258         struct vino_framebuffer *buffer[VINO_FRAMEBUFFER_COUNT_MAX];
259
260         spinlock_t queue_lock;
261         struct mutex queue_mutex;
262         wait_queue_head_t frame_wait_queue;
263 };
264
265 struct vino_interrupt_data {
266         struct timeval timestamp;
267         unsigned int frame_counter;
268         unsigned int skip_count;
269         unsigned int skip;
270 };
271
272 struct vino_channel_settings {
273         unsigned int channel;
274
275         int input;
276         unsigned int data_format;
277         unsigned int data_norm;
278         struct vino_clipping clipping;
279         unsigned int decimation;
280         unsigned int line_size;
281         unsigned int alpha;
282         unsigned int fps;
283         unsigned int framert_reg;
284
285         unsigned int fifo_threshold;
286
287         struct vino_framebuffer_queue fb_queue;
288
289         /* number of the current field */
290         unsigned int field;
291
292         /* read in progress */
293         int reading;
294         /* streaming is active */
295         int streaming;
296         /* the driver is currently processing the queue */
297         int capturing;
298
299         struct mutex mutex;
300         spinlock_t capture_lock;
301
302         unsigned int users;
303
304         struct vino_interrupt_data int_data;
305
306         /* V4L support */
307         struct video_device *vdev;
308 };
309
310 struct vino_settings {
311         struct v4l2_device v4l2_dev;
312         struct vino_channel_settings a;
313         struct vino_channel_settings b;
314
315         /* the channel which owns this client:
316          * VINO_NO_CHANNEL, VINO_CHANNEL_A or VINO_CHANNEL_B */
317         unsigned int decoder_owner;
318         struct v4l2_subdev *decoder;
319         unsigned int camera_owner;
320         struct v4l2_subdev *camera;
321
322         /* a lock for vino register access */
323         spinlock_t vino_lock;
324         /* a lock for channel input changes */
325         spinlock_t input_lock;
326
327         unsigned long dummy_page;
328         struct vino_descriptor_table dummy_desc_table;
329 };
330
331 /* Module parameters */
332
333 /*
334  * Using vino_pixel_conversion the ABGR32-format pixels supplied
335  * by the VINO chip can be converted to more common formats
336  * like RGBA32 (or probably RGB24 in the future). This way we
337  * can give out data that can be specified correctly with
338  * the V4L2-definitions.
339  *
340  * The pixel format is specified as RGBA32 when no conversion
341  * is used.
342  *
343  * Note that this only affects the 32-bit bit depth.
344  *
345  * Use non-zero value to enable conversion.
346  */
347 static int vino_pixel_conversion;
348
349 module_param_named(pixelconv, vino_pixel_conversion, int, 0);
350
351 MODULE_PARM_DESC(pixelconv,
352                  "enable pixel conversion (non-zero value enables)");
353
354 /* Internal data structures */
355
356 static struct sgi_vino *vino;
357
358 static struct vino_settings *vino_drvdata;
359
360 #define camera_call(o, f, args...) \
361         v4l2_subdev_call(vino_drvdata->camera, o, f, ##args)
362 #define decoder_call(o, f, args...) \
363         v4l2_subdev_call(vino_drvdata->decoder, o, f, ##args)
364
365 static const char *vino_driver_name = "vino";
366 static const char *vino_driver_description = "SGI VINO";
367 static const char *vino_bus_name = "GIO64 bus";
368 static const char *vino_vdev_name_a = "SGI VINO Channel A";
369 static const char *vino_vdev_name_b = "SGI VINO Channel B";
370
371 static void vino_capture_tasklet(unsigned long channel);
372
373 DECLARE_TASKLET(vino_tasklet_a, vino_capture_tasklet, VINO_CHANNEL_A);
374 DECLARE_TASKLET(vino_tasklet_b, vino_capture_tasklet, VINO_CHANNEL_B);
375
376 static const struct vino_input vino_inputs[] = {
377         {
378                 .name           = "Composite",
379                 .std            = V4L2_STD_NTSC | V4L2_STD_PAL
380                 | V4L2_STD_SECAM,
381         }, {
382                 .name           = "S-Video",
383                 .std            = V4L2_STD_NTSC | V4L2_STD_PAL
384                 | V4L2_STD_SECAM,
385         }, {
386                 .name           = "D1/IndyCam",
387                 .std            = V4L2_STD_NTSC,
388         }
389 };
390
391 static const struct vino_data_format vino_data_formats[] = {
392         {
393                 .description    = "8-bit greyscale",
394                 .bpp            = 1,
395                 .pixelformat    = V4L2_PIX_FMT_GREY,
396                 .colorspace     = V4L2_COLORSPACE_SMPTE170M,
397         }, {
398                 .description    = "8-bit dithered RGB 3-3-2",
399                 .bpp            = 1,
400                 .pixelformat    = V4L2_PIX_FMT_RGB332,
401                 .colorspace     = V4L2_COLORSPACE_SRGB,
402         }, {
403                 .description    = "32-bit RGB",
404                 .bpp            = 4,
405                 .pixelformat    = V4L2_PIX_FMT_RGB32,
406                 .colorspace     = V4L2_COLORSPACE_SRGB,
407         }, {
408                 .description    = "YUV 4:2:2",
409                 .bpp            = 2,
410                 .pixelformat    = V4L2_PIX_FMT_YUYV, // XXX: swapped?
411                 .colorspace     = V4L2_COLORSPACE_SMPTE170M,
412         }
413 };
414
415 static const struct vino_data_norm vino_data_norms[] = {
416         {
417                 .description    = "NTSC",
418                 .std            = V4L2_STD_NTSC,
419                 .fps_min        = 6,
420                 .fps_max        = 30,
421                 .framelines     = 525,
422                 .width          = VINO_NTSC_WIDTH,
423                 .height         = VINO_NTSC_HEIGHT,
424                 .odd            = {
425                         .top    = VINO_CLIPPING_START_ODD_NTSC,
426                         .left   = 0,
427                         .bottom = VINO_CLIPPING_START_ODD_NTSC
428                         + VINO_NTSC_HEIGHT / 2 - 1,
429                         .right  = VINO_NTSC_WIDTH,
430                 },
431                 .even           = {
432                         .top    = VINO_CLIPPING_START_EVEN_NTSC,
433                         .left   = 0,
434                         .bottom = VINO_CLIPPING_START_EVEN_NTSC
435                         + VINO_NTSC_HEIGHT / 2 - 1,
436                         .right  = VINO_NTSC_WIDTH,
437                 },
438         }, {
439                 .description    = "PAL",
440                 .std            = V4L2_STD_PAL,
441                 .fps_min        = 5,
442                 .fps_max        = 25,
443                 .framelines     = 625,
444                 .width          = VINO_PAL_WIDTH,
445                 .height         = VINO_PAL_HEIGHT,
446                 .odd            = {
447                         .top    = VINO_CLIPPING_START_ODD_PAL,
448                         .left   = 0,
449                         .bottom = VINO_CLIPPING_START_ODD_PAL
450                         + VINO_PAL_HEIGHT / 2 - 1,
451                         .right  = VINO_PAL_WIDTH,
452                 },
453                 .even           = {
454                         .top    = VINO_CLIPPING_START_EVEN_PAL,
455                         .left   = 0,
456                         .bottom = VINO_CLIPPING_START_EVEN_PAL
457                         + VINO_PAL_HEIGHT / 2 - 1,
458                         .right  = VINO_PAL_WIDTH,
459                 },
460         }, {
461                 .description    = "SECAM",
462                 .std            = V4L2_STD_SECAM,
463                 .fps_min        = 5,
464                 .fps_max        = 25,
465                 .framelines     = 625,
466                 .width          = VINO_PAL_WIDTH,
467                 .height         = VINO_PAL_HEIGHT,
468                 .odd            = {
469                         .top    = VINO_CLIPPING_START_ODD_PAL,
470                         .left   = 0,
471                         .bottom = VINO_CLIPPING_START_ODD_PAL
472                         + VINO_PAL_HEIGHT / 2 - 1,
473                         .right  = VINO_PAL_WIDTH,
474                 },
475                 .even           = {
476                         .top    = VINO_CLIPPING_START_EVEN_PAL,
477                         .left   = 0,
478                         .bottom = VINO_CLIPPING_START_EVEN_PAL
479                         + VINO_PAL_HEIGHT / 2 - 1,
480                         .right  = VINO_PAL_WIDTH,
481                 },
482         }, {
483                 .description    = "NTSC/D1",
484                 .std            = V4L2_STD_NTSC,
485                 .fps_min        = 6,
486                 .fps_max        = 30,
487                 .framelines     = 525,
488                 .width          = VINO_NTSC_WIDTH,
489                 .height         = VINO_NTSC_HEIGHT,
490                 .odd            = {
491                         .top    = VINO_CLIPPING_START_ODD_D1,
492                         .left   = 0,
493                         .bottom = VINO_CLIPPING_START_ODD_D1
494                         + VINO_NTSC_HEIGHT / 2 - 1,
495                         .right  = VINO_NTSC_WIDTH,
496                 },
497                 .even           = {
498                         .top    = VINO_CLIPPING_START_EVEN_D1,
499                         .left   = 0,
500                         .bottom = VINO_CLIPPING_START_EVEN_D1
501                         + VINO_NTSC_HEIGHT / 2 - 1,
502                         .right  = VINO_NTSC_WIDTH,
503                 },
504         }
505 };
506
507 #define VINO_INDYCAM_V4L2_CONTROL_COUNT         9
508
509 struct v4l2_queryctrl vino_indycam_v4l2_controls[] = {
510         {
511                 .id = V4L2_CID_AUTOGAIN,
512                 .type = V4L2_CTRL_TYPE_BOOLEAN,
513                 .name = "Automatic Gain Control",
514                 .minimum = 0,
515                 .maximum = 1,
516                 .step = 1,
517                 .default_value = INDYCAM_AGC_DEFAULT,
518         }, {
519                 .id = V4L2_CID_AUTO_WHITE_BALANCE,
520                 .type = V4L2_CTRL_TYPE_BOOLEAN,
521                 .name = "Automatic White Balance",
522                 .minimum = 0,
523                 .maximum = 1,
524                 .step = 1,
525                 .default_value = INDYCAM_AWB_DEFAULT,
526         }, {
527                 .id = V4L2_CID_GAIN,
528                 .type = V4L2_CTRL_TYPE_INTEGER,
529                 .name = "Gain",
530                 .minimum = INDYCAM_GAIN_MIN,
531                 .maximum = INDYCAM_GAIN_MAX,
532                 .step = 1,
533                 .default_value = INDYCAM_GAIN_DEFAULT,
534         }, {
535                 .id = INDYCAM_CONTROL_RED_SATURATION,
536                 .type = V4L2_CTRL_TYPE_INTEGER,
537                 .name = "Red Saturation",
538                 .minimum = INDYCAM_RED_SATURATION_MIN,
539                 .maximum = INDYCAM_RED_SATURATION_MAX,
540                 .step = 1,
541                 .default_value = INDYCAM_RED_SATURATION_DEFAULT,
542         }, {
543                 .id = INDYCAM_CONTROL_BLUE_SATURATION,
544                 .type = V4L2_CTRL_TYPE_INTEGER,
545                 .name = "Blue Saturation",
546                 .minimum = INDYCAM_BLUE_SATURATION_MIN,
547                 .maximum = INDYCAM_BLUE_SATURATION_MAX,
548                 .step = 1,
549                 .default_value = INDYCAM_BLUE_SATURATION_DEFAULT,
550         }, {
551                 .id = V4L2_CID_RED_BALANCE,
552                 .type = V4L2_CTRL_TYPE_INTEGER,
553                 .name = "Red Balance",
554                 .minimum = INDYCAM_RED_BALANCE_MIN,
555                 .maximum = INDYCAM_RED_BALANCE_MAX,
556                 .step = 1,
557                 .default_value = INDYCAM_RED_BALANCE_DEFAULT,
558         }, {
559                 .id = V4L2_CID_BLUE_BALANCE,
560                 .type = V4L2_CTRL_TYPE_INTEGER,
561                 .name = "Blue Balance",
562                 .minimum = INDYCAM_BLUE_BALANCE_MIN,
563                 .maximum = INDYCAM_BLUE_BALANCE_MAX,
564                 .step = 1,
565                 .default_value = INDYCAM_BLUE_BALANCE_DEFAULT,
566         }, {
567                 .id = V4L2_CID_EXPOSURE,
568                 .type = V4L2_CTRL_TYPE_INTEGER,
569                 .name = "Shutter Control",
570                 .minimum = INDYCAM_SHUTTER_MIN,
571                 .maximum = INDYCAM_SHUTTER_MAX,
572                 .step = 1,
573                 .default_value = INDYCAM_SHUTTER_DEFAULT,
574         }, {
575                 .id = V4L2_CID_GAMMA,
576                 .type = V4L2_CTRL_TYPE_INTEGER,
577                 .name = "Gamma",
578                 .minimum = INDYCAM_GAMMA_MIN,
579                 .maximum = INDYCAM_GAMMA_MAX,
580                 .step = 1,
581                 .default_value = INDYCAM_GAMMA_DEFAULT,
582         }
583 };
584
585 #define VINO_SAA7191_V4L2_CONTROL_COUNT         9
586
587 struct v4l2_queryctrl vino_saa7191_v4l2_controls[] = {
588         {
589                 .id = V4L2_CID_HUE,
590                 .type = V4L2_CTRL_TYPE_INTEGER,
591                 .name = "Hue",
592                 .minimum = SAA7191_HUE_MIN,
593                 .maximum = SAA7191_HUE_MAX,
594                 .step = 1,
595                 .default_value = SAA7191_HUE_DEFAULT,
596         }, {
597                 .id = SAA7191_CONTROL_BANDPASS,
598                 .type = V4L2_CTRL_TYPE_INTEGER,
599                 .name = "Luminance Bandpass",
600                 .minimum = SAA7191_BANDPASS_MIN,
601                 .maximum = SAA7191_BANDPASS_MAX,
602                 .step = 1,
603                 .default_value = SAA7191_BANDPASS_DEFAULT,
604         }, {
605                 .id = SAA7191_CONTROL_BANDPASS_WEIGHT,
606                 .type = V4L2_CTRL_TYPE_INTEGER,
607                 .name = "Luminance Bandpass Weight",
608                 .minimum = SAA7191_BANDPASS_WEIGHT_MIN,
609                 .maximum = SAA7191_BANDPASS_WEIGHT_MAX,
610                 .step = 1,
611                 .default_value = SAA7191_BANDPASS_WEIGHT_DEFAULT,
612         }, {
613                 .id = SAA7191_CONTROL_CORING,
614                 .type = V4L2_CTRL_TYPE_INTEGER,
615                 .name = "HF Luminance Coring",
616                 .minimum = SAA7191_CORING_MIN,
617                 .maximum = SAA7191_CORING_MAX,
618                 .step = 1,
619                 .default_value = SAA7191_CORING_DEFAULT,
620         }, {
621                 .id = SAA7191_CONTROL_FORCE_COLOUR,
622                 .type = V4L2_CTRL_TYPE_BOOLEAN,
623                 .name = "Force Colour",
624                 .minimum = SAA7191_FORCE_COLOUR_MIN,
625                 .maximum = SAA7191_FORCE_COLOUR_MAX,
626                 .step = 1,
627                 .default_value = SAA7191_FORCE_COLOUR_DEFAULT,
628         }, {
629                 .id = SAA7191_CONTROL_CHROMA_GAIN,
630                 .type = V4L2_CTRL_TYPE_INTEGER,
631                 .name = "Chrominance Gain Control",
632                 .minimum = SAA7191_CHROMA_GAIN_MIN,
633                 .maximum = SAA7191_CHROMA_GAIN_MAX,
634                 .step = 1,
635                 .default_value = SAA7191_CHROMA_GAIN_DEFAULT,
636         }, {
637                 .id = SAA7191_CONTROL_VTRC,
638                 .type = V4L2_CTRL_TYPE_BOOLEAN,
639                 .name = "VTR Time Constant",
640                 .minimum = SAA7191_VTRC_MIN,
641                 .maximum = SAA7191_VTRC_MAX,
642                 .step = 1,
643                 .default_value = SAA7191_VTRC_DEFAULT,
644         }, {
645                 .id = SAA7191_CONTROL_LUMA_DELAY,
646                 .type = V4L2_CTRL_TYPE_INTEGER,
647                 .name = "Luminance Delay Compensation",
648                 .minimum = SAA7191_LUMA_DELAY_MIN,
649                 .maximum = SAA7191_LUMA_DELAY_MAX,
650                 .step = 1,
651                 .default_value = SAA7191_LUMA_DELAY_DEFAULT,
652         }, {
653                 .id = SAA7191_CONTROL_VNR,
654                 .type = V4L2_CTRL_TYPE_INTEGER,
655                 .name = "Vertical Noise Reduction",
656                 .minimum = SAA7191_VNR_MIN,
657                 .maximum = SAA7191_VNR_MAX,
658                 .step = 1,
659                 .default_value = SAA7191_VNR_DEFAULT,
660         }
661 };
662
663 /* VINO framebuffer/DMA descriptor management */
664
665 static void vino_free_buffer_with_count(struct vino_framebuffer *fb,
666                                                unsigned int count)
667 {
668         unsigned int i;
669
670         dprintk("vino_free_buffer_with_count(): count = %d\n", count);
671
672         for (i = 0; i < count; i++) {
673                 ClearPageReserved(virt_to_page((void *)fb->desc_table.virtual[i]));
674                 dma_unmap_single(NULL,
675                                  fb->desc_table.dma_cpu[VINO_PAGE_RATIO * i],
676                                  PAGE_SIZE, DMA_FROM_DEVICE);
677                 free_page(fb->desc_table.virtual[i]);
678         }
679
680         dma_free_coherent(NULL,
681                           VINO_PAGE_RATIO * (fb->desc_table.page_count + 4) *
682                           sizeof(dma_addr_t), (void *)fb->desc_table.dma_cpu,
683                           fb->desc_table.dma);
684         kfree(fb->desc_table.virtual);
685
686         memset(fb, 0, sizeof(struct vino_framebuffer));
687 }
688
689 static void vino_free_buffer(struct vino_framebuffer *fb)
690 {
691         vino_free_buffer_with_count(fb, fb->desc_table.page_count);
692 }
693
694 static int vino_allocate_buffer(struct vino_framebuffer *fb,
695                                 unsigned int size)
696 {
697         unsigned int count, i, j;
698         int ret = 0;
699
700         dprintk("vino_allocate_buffer():\n");
701
702         if (size < 1)
703                 return -EINVAL;
704
705         memset(fb, 0, sizeof(struct vino_framebuffer));
706
707         count = ((size / PAGE_SIZE) + 4) & ~3;
708
709         dprintk("vino_allocate_buffer(): size = %d, count = %d\n",
710                 size, count);
711
712         /* allocate memory for table with virtual (page) addresses */
713         fb->desc_table.virtual = (unsigned long *)
714                 kmalloc(count * sizeof(unsigned long), GFP_KERNEL);
715         if (!fb->desc_table.virtual)
716                 return -ENOMEM;
717
718         /* allocate memory for table with dma addresses
719          * (has space for four extra descriptors) */
720         fb->desc_table.dma_cpu =
721                 dma_alloc_coherent(NULL, VINO_PAGE_RATIO * (count + 4) *
722                                    sizeof(dma_addr_t), &fb->desc_table.dma,
723                                    GFP_KERNEL | GFP_DMA);
724         if (!fb->desc_table.dma_cpu) {
725                 ret = -ENOMEM;
726                 goto out_free_virtual;
727         }
728
729         /* allocate pages for the buffer and acquire the according
730          * dma addresses */
731         for (i = 0; i < count; i++) {
732                 dma_addr_t dma_data_addr;
733
734                 fb->desc_table.virtual[i] =
735                         get_zeroed_page(GFP_KERNEL | GFP_DMA);
736                 if (!fb->desc_table.virtual[i]) {
737                         ret = -ENOBUFS;
738                         break;
739                 }
740
741                 dma_data_addr =
742                         dma_map_single(NULL,
743                                        (void *)fb->desc_table.virtual[i],
744                                        PAGE_SIZE, DMA_FROM_DEVICE);
745
746                 for (j = 0; j < VINO_PAGE_RATIO; j++) {
747                         fb->desc_table.dma_cpu[VINO_PAGE_RATIO * i + j] =
748                                 dma_data_addr + VINO_PAGE_SIZE * j;
749                 }
750
751                 SetPageReserved(virt_to_page((void *)fb->desc_table.virtual[i]));
752         }
753
754         /* page_count needs to be set anyway, because the descriptor table has
755          * been allocated according to this number */
756         fb->desc_table.page_count = count;
757
758         if (ret) {
759                 /* the descriptor with index i doesn't contain
760                  * a valid address yet */
761                 vino_free_buffer_with_count(fb, i);
762                 return ret;
763         }
764
765         //fb->size = size;
766         fb->size = count * PAGE_SIZE;
767         fb->data_format = VINO_DATA_FMT_NONE;
768
769         /* set the dma stop-bit for the last (count+1)th descriptor */
770         fb->desc_table.dma_cpu[VINO_PAGE_RATIO * count] = VINO_DESC_STOP;
771         return 0;
772
773  out_free_virtual:
774         kfree(fb->desc_table.virtual);
775         return ret;
776 }
777
778 #if 0
779 /* user buffers not fully implemented yet */
780 static int vino_prepare_user_buffer(struct vino_framebuffer *fb,
781                                      void *user,
782                                      unsigned int size)
783 {
784         unsigned int count, i, j;
785         int ret = 0;
786
787         dprintk("vino_prepare_user_buffer():\n");
788
789         if (size < 1)
790                 return -EINVAL;
791
792         memset(fb, 0, sizeof(struct vino_framebuffer));
793
794         count = ((size / PAGE_SIZE)) & ~3;
795
796         dprintk("vino_prepare_user_buffer(): size = %d, count = %d\n",
797                 size, count);
798
799         /* allocate memory for table with virtual (page) addresses */
800         fb->desc_table.virtual = (unsigned long *)
801                 kmalloc(count * sizeof(unsigned long), GFP_KERNEL);
802         if (!fb->desc_table.virtual)
803                 return -ENOMEM;
804
805         /* allocate memory for table with dma addresses
806          * (has space for four extra descriptors) */
807         fb->desc_table.dma_cpu =
808                 dma_alloc_coherent(NULL, VINO_PAGE_RATIO * (count + 4) *
809                                    sizeof(dma_addr_t), &fb->desc_table.dma,
810                                    GFP_KERNEL | GFP_DMA);
811         if (!fb->desc_table.dma_cpu) {
812                 ret = -ENOMEM;
813                 goto out_free_virtual;
814         }
815
816         /* allocate pages for the buffer and acquire the according
817          * dma addresses */
818         for (i = 0; i < count; i++) {
819                 dma_addr_t dma_data_addr;
820
821                 fb->desc_table.virtual[i] =
822                         get_zeroed_page(GFP_KERNEL | GFP_DMA);
823                 if (!fb->desc_table.virtual[i]) {
824                         ret = -ENOBUFS;
825                         break;
826                 }
827
828                 dma_data_addr =
829                         dma_map_single(NULL,
830                                        (void *)fb->desc_table.virtual[i],
831                                        PAGE_SIZE, DMA_FROM_DEVICE);
832
833                 for (j = 0; j < VINO_PAGE_RATIO; j++) {
834                         fb->desc_table.dma_cpu[VINO_PAGE_RATIO * i + j] =
835                                 dma_data_addr + VINO_PAGE_SIZE * j;
836                 }
837
838                 SetPageReserved(virt_to_page((void *)fb->desc_table.virtual[i]));
839         }
840
841         /* page_count needs to be set anyway, because the descriptor table has
842          * been allocated according to this number */
843         fb->desc_table.page_count = count;
844
845         if (ret) {
846                 /* the descriptor with index i doesn't contain
847                  * a valid address yet */
848                 vino_free_buffer_with_count(fb, i);
849                 return ret;
850         }
851
852         //fb->size = size;
853         fb->size = count * PAGE_SIZE;
854
855         /* set the dma stop-bit for the last (count+1)th descriptor */
856         fb->desc_table.dma_cpu[VINO_PAGE_RATIO * count] = VINO_DESC_STOP;
857         return 0;
858
859  out_free_virtual:
860         kfree(fb->desc_table.virtual);
861         return ret;
862 }
863 #endif
864
865 static void vino_sync_buffer(struct vino_framebuffer *fb)
866 {
867         int i;
868
869         dprintk("vino_sync_buffer():\n");
870
871         for (i = 0; i < fb->desc_table.page_count; i++)
872                 dma_sync_single_for_cpu(NULL,
873                                         fb->desc_table.dma_cpu[VINO_PAGE_RATIO * i],
874                                         PAGE_SIZE, DMA_FROM_DEVICE);
875 }
876
877 /* Framebuffer fifo functions (need to be locked externally) */
878
879 static inline void vino_fifo_init(struct vino_framebuffer_fifo *f,
880                            unsigned int length)
881 {
882         f->length = 0;
883         f->used = 0;
884         f->head = 0;
885         f->tail = 0;
886
887         if (length > VINO_FRAMEBUFFER_COUNT_MAX)
888                 length = VINO_FRAMEBUFFER_COUNT_MAX;
889
890         f->length = length;
891 }
892
893 /* returns true/false */
894 static inline int vino_fifo_has_id(struct vino_framebuffer_fifo *f,
895                                    unsigned int id)
896 {
897         unsigned int i;
898
899         for (i = f->head; i == (f->tail - 1); i = (i + 1) % f->length) {
900                 if (f->data[i] == id)
901                         return 1;
902         }
903
904         return 0;
905 }
906
907 #if 0
908 /* returns true/false */
909 static inline int vino_fifo_full(struct vino_framebuffer_fifo *f)
910 {
911         return (f->used == f->length);
912 }
913 #endif
914
915 static inline unsigned int vino_fifo_get_used(struct vino_framebuffer_fifo *f)
916 {
917         return f->used;
918 }
919
920 static int vino_fifo_enqueue(struct vino_framebuffer_fifo *f, unsigned int id)
921 {
922         if (id >= f->length) {
923                 return VINO_QUEUE_ERROR;
924         }
925
926         if (vino_fifo_has_id(f, id)) {
927                 return VINO_QUEUE_ERROR;
928         }
929
930         if (f->used < f->length) {
931                 f->data[f->tail] = id;
932                 f->tail = (f->tail + 1) % f->length;
933                 f->used++;
934         } else {
935                 return VINO_QUEUE_ERROR;
936         }
937
938         return 0;
939 }
940
941 static int vino_fifo_peek(struct vino_framebuffer_fifo *f, unsigned int *id)
942 {
943         if (f->used > 0) {
944                 *id = f->data[f->head];
945         } else {
946                 return VINO_QUEUE_ERROR;
947         }
948
949         return 0;
950 }
951
952 static int vino_fifo_dequeue(struct vino_framebuffer_fifo *f, unsigned int *id)
953 {
954         if (f->used > 0) {
955                 *id = f->data[f->head];
956                 f->head = (f->head + 1) % f->length;
957                 f->used--;
958         } else {
959                 return VINO_QUEUE_ERROR;
960         }
961
962         return 0;
963 }
964
965 /* Framebuffer queue functions */
966
967 /* execute with queue_lock locked */
968 static void vino_queue_free_with_count(struct vino_framebuffer_queue *q,
969                                        unsigned int length)
970 {
971         unsigned int i;
972
973         q->length = 0;
974         memset(&q->in, 0, sizeof(struct vino_framebuffer_fifo));
975         memset(&q->out, 0, sizeof(struct vino_framebuffer_fifo));
976         for (i = 0; i < length; i++) {
977                 dprintk("vino_queue_free_with_count(): freeing buffer %d\n",
978                         i);
979                 vino_free_buffer(q->buffer[i]);
980                 kfree(q->buffer[i]);
981         }
982
983         q->type = VINO_MEMORY_NONE;
984         q->magic = 0;
985 }
986
987 static void vino_queue_free(struct vino_framebuffer_queue *q)
988 {
989         dprintk("vino_queue_free():\n");
990
991         if (q->magic != VINO_QUEUE_MAGIC)
992                 return;
993         if (q->type != VINO_MEMORY_MMAP)
994                 return;
995
996         mutex_lock(&q->queue_mutex);
997
998         vino_queue_free_with_count(q, q->length);
999
1000         mutex_unlock(&q->queue_mutex);
1001 }
1002
1003 static int vino_queue_init(struct vino_framebuffer_queue *q,
1004                            unsigned int *length)
1005 {
1006         unsigned int i;
1007         int ret = 0;
1008
1009         dprintk("vino_queue_init(): length = %d\n", *length);
1010
1011         if (q->magic == VINO_QUEUE_MAGIC) {
1012                 dprintk("vino_queue_init(): queue already initialized!\n");
1013                 return -EINVAL;
1014         }
1015
1016         if (q->type != VINO_MEMORY_NONE) {
1017                 dprintk("vino_queue_init(): queue already initialized!\n");
1018                 return -EINVAL;
1019         }
1020
1021         if (*length < 1)
1022                 return -EINVAL;
1023
1024         mutex_lock(&q->queue_mutex);
1025
1026         if (*length > VINO_FRAMEBUFFER_COUNT_MAX)
1027                 *length = VINO_FRAMEBUFFER_COUNT_MAX;
1028
1029         q->length = 0;
1030
1031         for (i = 0; i < *length; i++) {
1032                 dprintk("vino_queue_init(): allocating buffer %d\n", i);
1033                 q->buffer[i] = kmalloc(sizeof(struct vino_framebuffer),
1034                                        GFP_KERNEL);
1035                 if (!q->buffer[i]) {
1036                         dprintk("vino_queue_init(): kmalloc() failed\n");
1037                         ret = -ENOMEM;
1038                         break;
1039                 }
1040
1041                 ret = vino_allocate_buffer(q->buffer[i],
1042                                            VINO_FRAMEBUFFER_SIZE);
1043                 if (ret) {
1044                         kfree(q->buffer[i]);
1045                         dprintk("vino_queue_init(): "
1046                                 "vino_allocate_buffer() failed\n");
1047                         break;
1048                 }
1049
1050                 q->buffer[i]->id = i;
1051                 if (i > 0) {
1052                         q->buffer[i]->offset = q->buffer[i - 1]->offset +
1053                                 q->buffer[i - 1]->size;
1054                 } else {
1055                         q->buffer[i]->offset = 0;
1056                 }
1057
1058                 spin_lock_init(&q->buffer[i]->state_lock);
1059
1060                 dprintk("vino_queue_init(): buffer = %d, offset = %d, "
1061                         "size = %d\n", i, q->buffer[i]->offset,
1062                         q->buffer[i]->size);
1063         }
1064
1065         if (ret) {
1066                 vino_queue_free_with_count(q, i);
1067                 *length = 0;
1068         } else {
1069                 q->length = *length;
1070                 vino_fifo_init(&q->in, q->length);
1071                 vino_fifo_init(&q->out, q->length);
1072                 q->type = VINO_MEMORY_MMAP;
1073                 q->magic = VINO_QUEUE_MAGIC;
1074         }
1075
1076         mutex_unlock(&q->queue_mutex);
1077
1078         return ret;
1079 }
1080
1081 static struct vino_framebuffer *vino_queue_add(struct
1082                                                vino_framebuffer_queue *q,
1083                                                unsigned int id)
1084 {
1085         struct vino_framebuffer *ret = NULL;
1086         unsigned int total;
1087         unsigned long flags;
1088
1089         dprintk("vino_queue_add(): id = %d\n", id);
1090
1091         if (q->magic != VINO_QUEUE_MAGIC) {
1092                 return ret;
1093         }
1094
1095         spin_lock_irqsave(&q->queue_lock, flags);
1096
1097         if (q->length == 0)
1098                 goto out;
1099
1100         if (id >= q->length)
1101                 goto out;
1102
1103         /* not needed?: if (vino_fifo_full(&q->out)) {
1104                 goto out;
1105                 }*/
1106         /* check that outgoing queue isn't already full
1107          * (or that it won't become full) */
1108         total = vino_fifo_get_used(&q->in) +
1109                 vino_fifo_get_used(&q->out);
1110         if (total >= q->length)
1111                 goto out;
1112
1113         if (vino_fifo_enqueue(&q->in, id))
1114                 goto out;
1115
1116         ret = q->buffer[id];
1117
1118 out:
1119         spin_unlock_irqrestore(&q->queue_lock, flags);
1120
1121         return ret;
1122 }
1123
1124 static struct vino_framebuffer *vino_queue_transfer(struct
1125                                                     vino_framebuffer_queue *q)
1126 {
1127         struct vino_framebuffer *ret = NULL;
1128         struct vino_framebuffer *fb;
1129         int id;
1130         unsigned long flags;
1131
1132         dprintk("vino_queue_transfer():\n");
1133
1134         if (q->magic != VINO_QUEUE_MAGIC) {
1135                 return ret;
1136         }
1137
1138         spin_lock_irqsave(&q->queue_lock, flags);
1139
1140         if (q->length == 0)
1141                 goto out;
1142
1143         // now this actually removes an entry from the incoming queue
1144         if (vino_fifo_dequeue(&q->in, &id)) {
1145                 goto out;
1146         }
1147
1148         dprintk("vino_queue_transfer(): id = %d\n", id);
1149         fb = q->buffer[id];
1150
1151         // we have already checked that the outgoing queue is not full, but...
1152         if (vino_fifo_enqueue(&q->out, id)) {
1153                 printk(KERN_ERR "vino_queue_transfer(): "
1154                        "outgoing queue is full, this shouldn't happen!\n");
1155                 goto out;
1156         }
1157
1158         ret = fb;
1159 out:
1160         spin_unlock_irqrestore(&q->queue_lock, flags);
1161
1162         return ret;
1163 }
1164
1165 /* returns true/false */
1166 static int vino_queue_incoming_contains(struct vino_framebuffer_queue *q,
1167                                         unsigned int id)
1168 {
1169         int ret = 0;
1170         unsigned long flags;
1171
1172         if (q->magic != VINO_QUEUE_MAGIC) {
1173                 return ret;
1174         }
1175
1176         spin_lock_irqsave(&q->queue_lock, flags);
1177
1178         if (q->length == 0)
1179                 goto out;
1180
1181         ret = vino_fifo_has_id(&q->in, id);
1182
1183 out:
1184         spin_unlock_irqrestore(&q->queue_lock, flags);
1185
1186         return ret;
1187 }
1188
1189 /* returns true/false */
1190 static int vino_queue_outgoing_contains(struct vino_framebuffer_queue *q,
1191                                         unsigned int id)
1192 {
1193         int ret = 0;
1194         unsigned long flags;
1195
1196         if (q->magic != VINO_QUEUE_MAGIC) {
1197                 return ret;
1198         }
1199
1200         spin_lock_irqsave(&q->queue_lock, flags);
1201
1202         if (q->length == 0)
1203                 goto out;
1204
1205         ret = vino_fifo_has_id(&q->out, id);
1206
1207 out:
1208         spin_unlock_irqrestore(&q->queue_lock, flags);
1209
1210         return ret;
1211 }
1212
1213 static int vino_queue_get_incoming(struct vino_framebuffer_queue *q,
1214                                    unsigned int *used)
1215 {
1216         int ret = 0;
1217         unsigned long flags;
1218
1219         if (q->magic != VINO_QUEUE_MAGIC) {
1220                 return VINO_QUEUE_ERROR;
1221         }
1222
1223         spin_lock_irqsave(&q->queue_lock, flags);
1224
1225         if (q->length == 0) {
1226                 ret = VINO_QUEUE_ERROR;
1227                 goto out;
1228         }
1229
1230         *used = vino_fifo_get_used(&q->in);
1231
1232 out:
1233         spin_unlock_irqrestore(&q->queue_lock, flags);
1234
1235         return ret;
1236 }
1237
1238 static int vino_queue_get_outgoing(struct vino_framebuffer_queue *q,
1239                                    unsigned int *used)
1240 {
1241         int ret = 0;
1242         unsigned long flags;
1243
1244         if (q->magic != VINO_QUEUE_MAGIC) {
1245                 return VINO_QUEUE_ERROR;
1246         }
1247
1248         spin_lock_irqsave(&q->queue_lock, flags);
1249
1250         if (q->length == 0) {
1251                 ret = VINO_QUEUE_ERROR;
1252                 goto out;
1253         }
1254
1255         *used = vino_fifo_get_used(&q->out);
1256
1257 out:
1258         spin_unlock_irqrestore(&q->queue_lock, flags);
1259
1260         return ret;
1261 }
1262
1263 #if 0
1264 static int vino_queue_get_total(struct vino_framebuffer_queue *q,
1265                                 unsigned int *total)
1266 {
1267         int ret = 0;
1268         unsigned long flags;
1269
1270         if (q->magic != VINO_QUEUE_MAGIC) {
1271                 return VINO_QUEUE_ERROR;
1272         }
1273
1274         spin_lock_irqsave(&q->queue_lock, flags);
1275
1276         if (q->length == 0) {
1277                 ret = VINO_QUEUE_ERROR;
1278                 goto out;
1279         }
1280
1281         *total = vino_fifo_get_used(&q->in) +
1282                 vino_fifo_get_used(&q->out);
1283
1284 out:
1285         spin_unlock_irqrestore(&q->queue_lock, flags);
1286
1287         return ret;
1288 }
1289 #endif
1290
1291 static struct vino_framebuffer *vino_queue_peek(struct
1292                                                 vino_framebuffer_queue *q,
1293                                                 unsigned int *id)
1294 {
1295         struct vino_framebuffer *ret = NULL;
1296         unsigned long flags;
1297
1298         if (q->magic != VINO_QUEUE_MAGIC) {
1299                 return ret;
1300         }
1301
1302         spin_lock_irqsave(&q->queue_lock, flags);
1303
1304         if (q->length == 0)
1305                 goto out;
1306
1307         if (vino_fifo_peek(&q->in, id)) {
1308                 goto out;
1309         }
1310
1311         ret = q->buffer[*id];
1312 out:
1313         spin_unlock_irqrestore(&q->queue_lock, flags);
1314
1315         return ret;
1316 }
1317
1318 static struct vino_framebuffer *vino_queue_remove(struct
1319                                                   vino_framebuffer_queue *q,
1320                                                   unsigned int *id)
1321 {
1322         struct vino_framebuffer *ret = NULL;
1323         unsigned long flags;
1324         dprintk("vino_queue_remove():\n");
1325
1326         if (q->magic != VINO_QUEUE_MAGIC) {
1327                 return ret;
1328         }
1329
1330         spin_lock_irqsave(&q->queue_lock, flags);
1331
1332         if (q->length == 0)
1333                 goto out;
1334
1335         if (vino_fifo_dequeue(&q->out, id)) {
1336                 goto out;
1337         }
1338
1339         dprintk("vino_queue_remove(): id = %d\n", *id);
1340         ret = q->buffer[*id];
1341 out:
1342         spin_unlock_irqrestore(&q->queue_lock, flags);
1343
1344         return ret;
1345 }
1346
1347 static struct
1348 vino_framebuffer *vino_queue_get_buffer(struct vino_framebuffer_queue *q,
1349                                         unsigned int id)
1350 {
1351         struct vino_framebuffer *ret = NULL;
1352         unsigned long flags;
1353
1354         if (q->magic != VINO_QUEUE_MAGIC) {
1355                 return ret;
1356         }
1357
1358         spin_lock_irqsave(&q->queue_lock, flags);
1359
1360         if (q->length == 0)
1361                 goto out;
1362
1363         if (id >= q->length)
1364                 goto out;
1365
1366         ret = q->buffer[id];
1367  out:
1368         spin_unlock_irqrestore(&q->queue_lock, flags);
1369
1370         return ret;
1371 }
1372
1373 static unsigned int vino_queue_get_length(struct vino_framebuffer_queue *q)
1374 {
1375         unsigned int length = 0;
1376         unsigned long flags;
1377
1378         if (q->magic != VINO_QUEUE_MAGIC) {
1379                 return length;
1380         }
1381
1382         spin_lock_irqsave(&q->queue_lock, flags);
1383         length = q->length;
1384         spin_unlock_irqrestore(&q->queue_lock, flags);
1385
1386         return length;
1387 }
1388
1389 static int vino_queue_has_mapped_buffers(struct vino_framebuffer_queue *q)
1390 {
1391         unsigned int i;
1392         int ret = 0;
1393         unsigned long flags;
1394
1395         if (q->magic != VINO_QUEUE_MAGIC) {
1396                 return ret;
1397         }
1398
1399         spin_lock_irqsave(&q->queue_lock, flags);
1400         for (i = 0; i < q->length; i++) {
1401                 if (q->buffer[i]->map_count > 0) {
1402                         ret = 1;
1403                         break;
1404                 }
1405         }
1406         spin_unlock_irqrestore(&q->queue_lock, flags);
1407
1408         return ret;
1409 }
1410
1411 /* VINO functions */
1412
1413 /* execute with input_lock locked */
1414 static void vino_update_line_size(struct vino_channel_settings *vcs)
1415 {
1416         unsigned int w = vcs->clipping.right - vcs->clipping.left;
1417         unsigned int d = vcs->decimation;
1418         unsigned int bpp = vino_data_formats[vcs->data_format].bpp;
1419         unsigned int lsize;
1420
1421         dprintk("update_line_size(): before: w = %d, d = %d, "
1422                 "line_size = %d\n", w, d, vcs->line_size);
1423
1424         /* line size must be multiple of 8 bytes */
1425         lsize = (bpp * (w / d)) & ~7;
1426         w = (lsize / bpp) * d;
1427
1428         vcs->clipping.right = vcs->clipping.left + w;
1429         vcs->line_size = lsize;
1430
1431         dprintk("update_line_size(): after: w = %d, d = %d, "
1432                 "line_size = %d\n", w, d, vcs->line_size);
1433 }
1434
1435 /* execute with input_lock locked */
1436 static void vino_set_clipping(struct vino_channel_settings *vcs,
1437                               unsigned int x, unsigned int y,
1438                               unsigned int w, unsigned int h)
1439 {
1440         unsigned int maxwidth, maxheight;
1441         unsigned int d;
1442
1443         maxwidth = vino_data_norms[vcs->data_norm].width;
1444         maxheight = vino_data_norms[vcs->data_norm].height;
1445         d = vcs->decimation;
1446
1447         y &= ~1;        /* odd/even fields */
1448
1449         if (x > maxwidth) {
1450                 x = 0;
1451         }
1452         if (y > maxheight) {
1453                 y = 0;
1454         }
1455
1456         if (((w / d) < VINO_MIN_WIDTH)
1457             || ((h / d) < VINO_MIN_HEIGHT)) {
1458                 w = VINO_MIN_WIDTH * d;
1459                 h = VINO_MIN_HEIGHT * d;
1460         }
1461
1462         if ((x + w) > maxwidth) {
1463                 w = maxwidth - x;
1464                 if ((w / d) < VINO_MIN_WIDTH)
1465                         x = maxwidth - VINO_MIN_WIDTH * d;
1466         }
1467         if ((y + h) > maxheight) {
1468                 h = maxheight - y;
1469                 if ((h / d) < VINO_MIN_HEIGHT)
1470                         y = maxheight - VINO_MIN_HEIGHT * d;
1471         }
1472
1473         vcs->clipping.left = x;
1474         vcs->clipping.top = y;
1475         vcs->clipping.right = x + w;
1476         vcs->clipping.bottom = y + h;
1477
1478         vino_update_line_size(vcs);
1479
1480         dprintk("clipping %d, %d, %d, %d / %d - %d\n",
1481                 vcs->clipping.left, vcs->clipping.top, vcs->clipping.right,
1482                 vcs->clipping.bottom, vcs->decimation, vcs->line_size);
1483 }
1484
1485 /* execute with input_lock locked */
1486 static inline void vino_set_default_clipping(struct vino_channel_settings *vcs)
1487 {
1488         vino_set_clipping(vcs, 0, 0, vino_data_norms[vcs->data_norm].width,
1489                           vino_data_norms[vcs->data_norm].height);
1490 }
1491
1492 /* execute with input_lock locked */
1493 static void vino_set_scaling(struct vino_channel_settings *vcs,
1494                              unsigned int w, unsigned int h)
1495 {
1496         unsigned int x, y, curw, curh, d;
1497
1498         x = vcs->clipping.left;
1499         y = vcs->clipping.top;
1500         curw = vcs->clipping.right - vcs->clipping.left;
1501         curh = vcs->clipping.bottom - vcs->clipping.top;
1502
1503         d = max(curw / w, curh / h);
1504
1505         dprintk("scaling w: %d, h: %d, curw: %d, curh: %d, d: %d\n",
1506                 w, h, curw, curh, d);
1507
1508         if (d < 1) {
1509                 d = 1;
1510         } else if (d > 8) {
1511                 d = 8;
1512         }
1513
1514         vcs->decimation = d;
1515         vino_set_clipping(vcs, x, y, w * d, h * d);
1516
1517         dprintk("scaling %d, %d, %d, %d / %d - %d\n", vcs->clipping.left,
1518                 vcs->clipping.top, vcs->clipping.right, vcs->clipping.bottom,
1519                 vcs->decimation, vcs->line_size);
1520 }
1521
1522 /* execute with input_lock locked */
1523 static inline void vino_set_default_scaling(struct vino_channel_settings *vcs)
1524 {
1525         vino_set_scaling(vcs, vcs->clipping.right - vcs->clipping.left,
1526                          vcs->clipping.bottom - vcs->clipping.top);
1527 }
1528
1529 /* execute with input_lock locked */
1530 static void vino_set_framerate(struct vino_channel_settings *vcs,
1531                                unsigned int fps)
1532 {
1533         unsigned int mask;
1534
1535         switch (vcs->data_norm) {
1536         case VINO_DATA_NORM_NTSC:
1537         case VINO_DATA_NORM_D1:
1538                 fps = (unsigned int)(fps / 6) * 6; // FIXME: round!
1539
1540                 if (fps < vino_data_norms[vcs->data_norm].fps_min)
1541                         fps = vino_data_norms[vcs->data_norm].fps_min;
1542                 if (fps > vino_data_norms[vcs->data_norm].fps_max)
1543                         fps = vino_data_norms[vcs->data_norm].fps_max;
1544
1545                 switch (fps) {
1546                 case 6:
1547                         mask = 0x003;
1548                         break;
1549                 case 12:
1550                         mask = 0x0c3;
1551                         break;
1552                 case 18:
1553                         mask = 0x333;
1554                         break;
1555                 case 24:
1556                         mask = 0x3ff;
1557                         break;
1558                 case 30:
1559                         mask = 0xfff;
1560                         break;
1561                 default:
1562                         mask = VINO_FRAMERT_FULL;
1563                 }
1564                 vcs->framert_reg = VINO_FRAMERT_RT(mask);
1565                 break;
1566         case VINO_DATA_NORM_PAL:
1567         case VINO_DATA_NORM_SECAM:
1568                 fps = (unsigned int)(fps / 5) * 5; // FIXME: round!
1569
1570                 if (fps < vino_data_norms[vcs->data_norm].fps_min)
1571                         fps = vino_data_norms[vcs->data_norm].fps_min;
1572                 if (fps > vino_data_norms[vcs->data_norm].fps_max)
1573                         fps = vino_data_norms[vcs->data_norm].fps_max;
1574
1575                 switch (fps) {
1576                 case 5:
1577                         mask = 0x003;
1578                         break;
1579                 case 10:
1580                         mask = 0x0c3;
1581                         break;
1582                 case 15:
1583                         mask = 0x333;
1584                         break;
1585                 case 20:
1586                         mask = 0x0ff;
1587                         break;
1588                 case 25:
1589                         mask = 0x3ff;
1590                         break;
1591                 default:
1592                         mask = VINO_FRAMERT_FULL;
1593                 }
1594                 vcs->framert_reg = VINO_FRAMERT_RT(mask) | VINO_FRAMERT_PAL;
1595                 break;
1596         }
1597
1598         vcs->fps = fps;
1599 }
1600
1601 /* execute with input_lock locked */
1602 static inline void vino_set_default_framerate(struct
1603                                               vino_channel_settings *vcs)
1604 {
1605         vino_set_framerate(vcs, vino_data_norms[vcs->data_norm].fps_max);
1606 }
1607
1608 /* VINO I2C bus functions */
1609
1610 struct i2c_algo_sgi_data {
1611         void *data;     /* private data for lowlevel routines */
1612         unsigned (*getctrl)(void *data);
1613         void (*setctrl)(void *data, unsigned val);
1614         unsigned (*rdata)(void *data);
1615         void (*wdata)(void *data, unsigned val);
1616
1617         int xfer_timeout;
1618         int ack_timeout;
1619 };
1620
1621 static int wait_xfer_done(struct i2c_algo_sgi_data *adap)
1622 {
1623         int i;
1624
1625         for (i = 0; i < adap->xfer_timeout; i++) {
1626                 if ((adap->getctrl(adap->data) & SGI_I2C_XFER_BUSY) == 0)
1627                         return 0;
1628                 udelay(1);
1629         }
1630
1631         return -ETIMEDOUT;
1632 }
1633
1634 static int wait_ack(struct i2c_algo_sgi_data *adap)
1635 {
1636         int i;
1637
1638         if (wait_xfer_done(adap))
1639                 return -ETIMEDOUT;
1640         for (i = 0; i < adap->ack_timeout; i++) {
1641                 if ((adap->getctrl(adap->data) & SGI_I2C_NACK) == 0)
1642                         return 0;
1643                 udelay(1);
1644         }
1645
1646         return -ETIMEDOUT;
1647 }
1648
1649 static int force_idle(struct i2c_algo_sgi_data *adap)
1650 {
1651         int i;
1652
1653         adap->setctrl(adap->data, SGI_I2C_FORCE_IDLE);
1654         for (i = 0; i < adap->xfer_timeout; i++) {
1655                 if ((adap->getctrl(adap->data) & SGI_I2C_NOT_IDLE) == 0)
1656                         goto out;
1657                 udelay(1);
1658         }
1659         return -ETIMEDOUT;
1660 out:
1661         if (adap->getctrl(adap->data) & SGI_I2C_BUS_ERR)
1662                 return -EIO;
1663         return 0;
1664 }
1665
1666 static int do_address(struct i2c_algo_sgi_data *adap, unsigned int addr,
1667                       int rd)
1668 {
1669         if (rd)
1670                 adap->setctrl(adap->data, SGI_I2C_NOT_IDLE);
1671         /* Check if bus is idle, eventually force it to do so */
1672         if (adap->getctrl(adap->data) & SGI_I2C_NOT_IDLE)
1673                 if (force_idle(adap))
1674                         return -EIO;
1675         /* Write out the i2c chip address and specify operation */
1676         adap->setctrl(adap->data,
1677                       SGI_I2C_HOLD_BUS | SGI_I2C_WRITE | SGI_I2C_NOT_IDLE);
1678         if (rd)
1679                 addr |= 1;
1680         adap->wdata(adap->data, addr);
1681         if (wait_ack(adap))
1682                 return -EIO;
1683         return 0;
1684 }
1685
1686 static int i2c_read(struct i2c_algo_sgi_data *adap, unsigned char *buf,
1687                     unsigned int len)
1688 {
1689         int i;
1690
1691         adap->setctrl(adap->data,
1692                       SGI_I2C_HOLD_BUS | SGI_I2C_READ | SGI_I2C_NOT_IDLE);
1693         for (i = 0; i < len; i++) {
1694                 if (wait_xfer_done(adap))
1695                         return -EIO;
1696                 buf[i] = adap->rdata(adap->data);
1697         }
1698         adap->setctrl(adap->data, SGI_I2C_RELEASE_BUS | SGI_I2C_FORCE_IDLE);
1699
1700         return 0;
1701
1702 }
1703
1704 static int i2c_write(struct i2c_algo_sgi_data *adap, unsigned char *buf,
1705                      unsigned int len)
1706 {
1707         int i;
1708
1709         /* We are already in write state */
1710         for (i = 0; i < len; i++) {
1711                 adap->wdata(adap->data, buf[i]);
1712                 if (wait_ack(adap))
1713                         return -EIO;
1714         }
1715         return 0;
1716 }
1717
1718 static int sgi_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
1719                     int num)
1720 {
1721         struct i2c_algo_sgi_data *adap = i2c_adap->algo_data;
1722         struct i2c_msg *p;
1723         int i, err = 0;
1724
1725         for (i = 0; !err && i < num; i++) {
1726                 p = &msgs[i];
1727                 err = do_address(adap, p->addr, p->flags & I2C_M_RD);
1728                 if (err || !p->len)
1729                         continue;
1730                 if (p->flags & I2C_M_RD)
1731                         err = i2c_read(adap, p->buf, p->len);
1732                 else
1733                         err = i2c_write(adap, p->buf, p->len);
1734         }
1735
1736         return (err < 0) ? err : i;
1737 }
1738
1739 static u32 sgi_func(struct i2c_adapter *adap)
1740 {
1741         return I2C_FUNC_SMBUS_EMUL;
1742 }
1743
1744 static const struct i2c_algorithm sgi_algo = {
1745         .master_xfer    = sgi_xfer,
1746         .functionality  = sgi_func,
1747 };
1748
1749 static unsigned i2c_vino_getctrl(void *data)
1750 {
1751         return vino->i2c_control;
1752 }
1753
1754 static void i2c_vino_setctrl(void *data, unsigned val)
1755 {
1756         vino->i2c_control = val;
1757 }
1758
1759 static unsigned i2c_vino_rdata(void *data)
1760 {
1761         return vino->i2c_data;
1762 }
1763
1764 static void i2c_vino_wdata(void *data, unsigned val)
1765 {
1766         vino->i2c_data = val;
1767 }
1768
1769 static struct i2c_algo_sgi_data i2c_sgi_vino_data = {
1770         .getctrl = &i2c_vino_getctrl,
1771         .setctrl = &i2c_vino_setctrl,
1772         .rdata   = &i2c_vino_rdata,
1773         .wdata   = &i2c_vino_wdata,
1774         .xfer_timeout = 200,
1775         .ack_timeout  = 1000,
1776 };
1777
1778 static struct i2c_adapter vino_i2c_adapter = {
1779         .name                   = "VINO I2C bus",
1780         .algo                   = &sgi_algo,
1781         .algo_data              = &i2c_sgi_vino_data,
1782         .owner                  = THIS_MODULE,
1783 };
1784
1785 /*
1786  * Prepare VINO for DMA transfer...
1787  * (execute only with vino_lock and input_lock locked)
1788  */
1789 static int vino_dma_setup(struct vino_channel_settings *vcs,
1790                           struct vino_framebuffer *fb)
1791 {
1792         u32 ctrl, intr;
1793         struct sgi_vino_channel *ch;
1794         const struct vino_data_norm *norm;
1795
1796         dprintk("vino_dma_setup():\n");
1797
1798         vcs->field = 0;
1799         fb->frame_counter = 0;
1800
1801         ch = (vcs->channel == VINO_CHANNEL_A) ? &vino->a : &vino->b;
1802         norm = &vino_data_norms[vcs->data_norm];
1803
1804         ch->page_index = 0;
1805         ch->line_count = 0;
1806
1807         /* VINO line size register is set 8 bytes less than actual */
1808         ch->line_size = vcs->line_size - 8;
1809
1810         /* let VINO know where to transfer data */
1811         ch->start_desc_tbl = fb->desc_table.dma;
1812         ch->next_4_desc = fb->desc_table.dma;
1813
1814         /* give vino time to fetch the first four descriptors, 5 usec
1815          * should be more than enough time */
1816         udelay(VINO_DESC_FETCH_DELAY);
1817
1818         dprintk("vino_dma_setup(): start desc = %08x, next 4 desc = %08x\n",
1819                 ch->start_desc_tbl, ch->next_4_desc);
1820
1821         /* set the alpha register */
1822         ch->alpha = vcs->alpha;
1823
1824         /* set clipping registers */
1825         ch->clip_start = VINO_CLIP_ODD(norm->odd.top + vcs->clipping.top / 2) |
1826                 VINO_CLIP_EVEN(norm->even.top +
1827                                vcs->clipping.top / 2) |
1828                 VINO_CLIP_X(vcs->clipping.left);
1829         ch->clip_end = VINO_CLIP_ODD(norm->odd.top +
1830                                      vcs->clipping.bottom / 2 - 1) |
1831                 VINO_CLIP_EVEN(norm->even.top +
1832                                vcs->clipping.bottom / 2 - 1) |
1833                 VINO_CLIP_X(vcs->clipping.right);
1834
1835         /* set the size of actual content in the buffer (DECIMATION !) */
1836         fb->data_size = ((vcs->clipping.right - vcs->clipping.left) /
1837                          vcs->decimation) *
1838                 ((vcs->clipping.bottom - vcs->clipping.top) /
1839                  vcs->decimation) *
1840                 vino_data_formats[vcs->data_format].bpp;
1841
1842         ch->frame_rate = vcs->framert_reg;
1843
1844         ctrl = vino->control;
1845         intr = vino->intr_status;
1846
1847         if (vcs->channel == VINO_CHANNEL_A) {
1848                 /* All interrupt conditions for this channel was cleared
1849                  * so clear the interrupt status register and enable
1850                  * interrupts */
1851                 intr &= ~VINO_INTSTAT_A;
1852                 ctrl |= VINO_CTRL_A_INT;
1853
1854                 /* enable synchronization */
1855                 ctrl |= VINO_CTRL_A_SYNC_ENBL;
1856
1857                 /* enable frame assembly */
1858                 ctrl |= VINO_CTRL_A_INTERLEAVE_ENBL;
1859
1860                 /* set decimation used */
1861                 if (vcs->decimation < 2)
1862                         ctrl &= ~VINO_CTRL_A_DEC_ENBL;
1863                 else {
1864                         ctrl |= VINO_CTRL_A_DEC_ENBL;
1865                         ctrl &= ~VINO_CTRL_A_DEC_SCALE_MASK;
1866                         ctrl |= (vcs->decimation - 1) <<
1867                                 VINO_CTRL_A_DEC_SCALE_SHIFT;
1868                 }
1869
1870                 /* select input interface */
1871                 if (vcs->input == VINO_INPUT_D1)
1872                         ctrl |= VINO_CTRL_A_SELECT;
1873                 else
1874                         ctrl &= ~VINO_CTRL_A_SELECT;
1875
1876                 /* palette */
1877                 ctrl &= ~(VINO_CTRL_A_LUMA_ONLY | VINO_CTRL_A_RGB |
1878                           VINO_CTRL_A_DITHER);
1879         } else {
1880                 intr &= ~VINO_INTSTAT_B;
1881                 ctrl |= VINO_CTRL_B_INT;
1882
1883                 ctrl |= VINO_CTRL_B_SYNC_ENBL;
1884                 ctrl |= VINO_CTRL_B_INTERLEAVE_ENBL;
1885
1886                 if (vcs->decimation < 2)
1887                         ctrl &= ~VINO_CTRL_B_DEC_ENBL;
1888                 else {
1889                         ctrl |= VINO_CTRL_B_DEC_ENBL;
1890                         ctrl &= ~VINO_CTRL_B_DEC_SCALE_MASK;
1891                         ctrl |= (vcs->decimation - 1) <<
1892                                 VINO_CTRL_B_DEC_SCALE_SHIFT;
1893
1894                 }
1895                 if (vcs->input == VINO_INPUT_D1)
1896                         ctrl |= VINO_CTRL_B_SELECT;
1897                 else
1898                         ctrl &= ~VINO_CTRL_B_SELECT;
1899
1900                 ctrl &= ~(VINO_CTRL_B_LUMA_ONLY | VINO_CTRL_B_RGB |
1901                           VINO_CTRL_B_DITHER);
1902         }
1903
1904         /* set palette */
1905         fb->data_format = vcs->data_format;
1906
1907         switch (vcs->data_format) {
1908                 case VINO_DATA_FMT_GREY:
1909                         ctrl |= (vcs->channel == VINO_CHANNEL_A) ?
1910                                 VINO_CTRL_A_LUMA_ONLY : VINO_CTRL_B_LUMA_ONLY;
1911                         break;
1912                 case VINO_DATA_FMT_RGB32:
1913                         ctrl |= (vcs->channel == VINO_CHANNEL_A) ?
1914                                 VINO_CTRL_A_RGB : VINO_CTRL_B_RGB;
1915                         break;
1916                 case VINO_DATA_FMT_YUV:
1917                         /* nothing needs to be done */
1918                         break;
1919                 case VINO_DATA_FMT_RGB332:
1920                         ctrl |= (vcs->channel == VINO_CHANNEL_A) ?
1921                                 VINO_CTRL_A_RGB | VINO_CTRL_A_DITHER :
1922                                 VINO_CTRL_B_RGB | VINO_CTRL_B_DITHER;
1923                         break;
1924         }
1925
1926         vino->intr_status = intr;
1927         vino->control = ctrl;
1928
1929         return 0;
1930 }
1931
1932 /* (execute only with vino_lock locked) */
1933 static inline void vino_dma_start(struct vino_channel_settings *vcs)
1934 {
1935         u32 ctrl = vino->control;
1936
1937         dprintk("vino_dma_start():\n");
1938         ctrl |= (vcs->channel == VINO_CHANNEL_A) ?
1939                 VINO_CTRL_A_DMA_ENBL : VINO_CTRL_B_DMA_ENBL;
1940         vino->control = ctrl;
1941 }
1942
1943 /* (execute only with vino_lock locked) */
1944 static inline void vino_dma_stop(struct vino_channel_settings *vcs)
1945 {
1946         u32 ctrl = vino->control;
1947
1948         ctrl &= (vcs->channel == VINO_CHANNEL_A) ?
1949                 ~VINO_CTRL_A_DMA_ENBL : ~VINO_CTRL_B_DMA_ENBL;
1950         ctrl &= (vcs->channel == VINO_CHANNEL_A) ?
1951                 ~VINO_CTRL_A_INT : ~VINO_CTRL_B_INT;
1952         vino->control = ctrl;
1953         dprintk("vino_dma_stop():\n");
1954 }
1955
1956 /*
1957  * Load dummy page to descriptor registers. This prevents generating of
1958  * spurious interrupts. (execute only with vino_lock locked)
1959  */
1960 static void vino_clear_interrupt(struct vino_channel_settings *vcs)
1961 {
1962         struct sgi_vino_channel *ch;
1963
1964         ch = (vcs->channel == VINO_CHANNEL_A) ? &vino->a : &vino->b;
1965
1966         ch->page_index = 0;
1967         ch->line_count = 0;
1968
1969         ch->start_desc_tbl = vino_drvdata->dummy_desc_table.dma;
1970         ch->next_4_desc = vino_drvdata->dummy_desc_table.dma;
1971
1972         udelay(VINO_DESC_FETCH_DELAY);
1973         dprintk("channel %c clear interrupt condition\n",
1974                (vcs->channel == VINO_CHANNEL_A) ? 'A':'B');
1975 }
1976
1977 static int vino_capture(struct vino_channel_settings *vcs,
1978                         struct vino_framebuffer *fb)
1979 {
1980         int err = 0;
1981         unsigned long flags, flags2;
1982
1983         spin_lock_irqsave(&fb->state_lock, flags);
1984
1985         if (fb->state == VINO_FRAMEBUFFER_IN_USE)
1986                 err = -EBUSY;
1987         fb->state = VINO_FRAMEBUFFER_IN_USE;
1988
1989         spin_unlock_irqrestore(&fb->state_lock, flags);
1990
1991         if (err)
1992                 return err;
1993
1994         spin_lock_irqsave(&vino_drvdata->vino_lock, flags);
1995         spin_lock_irqsave(&vino_drvdata->input_lock, flags2);
1996
1997         vino_dma_setup(vcs, fb);
1998         vino_dma_start(vcs);
1999
2000         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags2);
2001         spin_unlock_irqrestore(&vino_drvdata->vino_lock, flags);
2002
2003         return err;
2004 }
2005
2006 static
2007 struct vino_framebuffer *vino_capture_enqueue(struct
2008                                               vino_channel_settings *vcs,
2009                                               unsigned int index)
2010 {
2011         struct vino_framebuffer *fb;
2012         unsigned long flags;
2013
2014         dprintk("vino_capture_enqueue():\n");
2015
2016         spin_lock_irqsave(&vcs->capture_lock, flags);
2017
2018         fb = vino_queue_add(&vcs->fb_queue, index);
2019         if (fb == NULL) {
2020                 dprintk("vino_capture_enqueue(): vino_queue_add() failed, "
2021                         "queue full?\n");
2022                 goto out;
2023         }
2024 out:
2025         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2026
2027         return fb;
2028 }
2029
2030 static int vino_capture_next(struct vino_channel_settings *vcs, int start)
2031 {
2032         struct vino_framebuffer *fb;
2033         unsigned int incoming, id;
2034         int err = 0;
2035         unsigned long flags;
2036
2037         dprintk("vino_capture_next():\n");
2038
2039         spin_lock_irqsave(&vcs->capture_lock, flags);
2040
2041         if (start) {
2042                 /* start capture only if capture isn't in progress already */
2043                 if (vcs->capturing) {
2044                         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2045                         return 0;
2046                 }
2047
2048         } else {
2049                 /* capture next frame:
2050                  * stop capture if capturing is not set */
2051                 if (!vcs->capturing) {
2052                         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2053                         return 0;
2054                 }
2055         }
2056
2057         err = vino_queue_get_incoming(&vcs->fb_queue, &incoming);
2058         if (err) {
2059                 dprintk("vino_capture_next(): vino_queue_get_incoming() "
2060                         "failed\n");
2061                 err = -EINVAL;
2062                 goto out;
2063         }
2064         if (incoming == 0) {
2065                 dprintk("vino_capture_next(): no buffers available\n");
2066                 goto out;
2067         }
2068
2069         fb = vino_queue_peek(&vcs->fb_queue, &id);
2070         if (fb == NULL) {
2071                 dprintk("vino_capture_next(): vino_queue_peek() failed\n");
2072                 err = -EINVAL;
2073                 goto out;
2074         }
2075
2076         if (start) {
2077                 vcs->capturing = 1;
2078         }
2079
2080         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2081
2082         err = vino_capture(vcs, fb);
2083
2084         return err;
2085
2086 out:
2087         vcs->capturing = 0;
2088         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2089
2090         return err;
2091 }
2092
2093 static inline int vino_is_capturing(struct vino_channel_settings *vcs)
2094 {
2095         int ret;
2096         unsigned long flags;
2097
2098         spin_lock_irqsave(&vcs->capture_lock, flags);
2099
2100         ret = vcs->capturing;
2101
2102         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2103
2104         return ret;
2105 }
2106
2107 /* waits until a frame is captured */
2108 static int vino_wait_for_frame(struct vino_channel_settings *vcs)
2109 {
2110         wait_queue_t wait;
2111         int err = 0;
2112
2113         dprintk("vino_wait_for_frame():\n");
2114
2115         init_waitqueue_entry(&wait, current);
2116         /* add ourselves into wait queue */
2117         add_wait_queue(&vcs->fb_queue.frame_wait_queue, &wait);
2118
2119         /* to ensure that schedule_timeout will return immediately
2120          * if VINO interrupt was triggered meanwhile */
2121         schedule_timeout_interruptible(msecs_to_jiffies(100));
2122
2123         if (signal_pending(current))
2124                 err = -EINTR;
2125
2126         remove_wait_queue(&vcs->fb_queue.frame_wait_queue, &wait);
2127
2128         dprintk("vino_wait_for_frame(): waiting for frame %s\n",
2129                 err ? "failed" : "ok");
2130
2131         return err;
2132 }
2133
2134 /* the function assumes that PAGE_SIZE % 4 == 0 */
2135 static void vino_convert_to_rgba(struct vino_framebuffer *fb) {
2136         unsigned char *pageptr;
2137         unsigned int page, i;
2138         unsigned char a;
2139
2140         for (page = 0; page < fb->desc_table.page_count; page++) {
2141                 pageptr = (unsigned char *)fb->desc_table.virtual[page];
2142
2143                 for (i = 0; i < PAGE_SIZE; i += 4) {
2144                         a = pageptr[0];
2145                         pageptr[0] = pageptr[3];
2146                         pageptr[1] = pageptr[2];
2147                         pageptr[2] = pageptr[1];
2148                         pageptr[3] = a;
2149                         pageptr += 4;
2150                 }
2151         }
2152 }
2153
2154 /* checks if the buffer is in correct state and syncs data */
2155 static int vino_check_buffer(struct vino_channel_settings *vcs,
2156                              struct vino_framebuffer *fb)
2157 {
2158         int err = 0;
2159         unsigned long flags;
2160
2161         dprintk("vino_check_buffer():\n");
2162
2163         spin_lock_irqsave(&fb->state_lock, flags);
2164         switch (fb->state) {
2165         case VINO_FRAMEBUFFER_IN_USE:
2166                 err = -EIO;
2167                 break;
2168         case VINO_FRAMEBUFFER_READY:
2169                 vino_sync_buffer(fb);
2170                 fb->state = VINO_FRAMEBUFFER_UNUSED;
2171                 break;
2172         default:
2173                 err = -EINVAL;
2174         }
2175         spin_unlock_irqrestore(&fb->state_lock, flags);
2176
2177         if (!err) {
2178                 if (vino_pixel_conversion
2179                     && (fb->data_format == VINO_DATA_FMT_RGB32)) {
2180                         vino_convert_to_rgba(fb);
2181                 }
2182         } else if (err && (err != -EINVAL)) {
2183                 dprintk("vino_check_buffer(): buffer not ready\n");
2184
2185                 spin_lock_irqsave(&vino_drvdata->vino_lock, flags);
2186                 vino_dma_stop(vcs);
2187                 vino_clear_interrupt(vcs);
2188                 spin_unlock_irqrestore(&vino_drvdata->vino_lock, flags);
2189         }
2190
2191         return err;
2192 }
2193
2194 /* forcefully terminates capture */
2195 static void vino_capture_stop(struct vino_channel_settings *vcs)
2196 {
2197         unsigned int incoming = 0, outgoing = 0, id;
2198         unsigned long flags, flags2;
2199
2200         dprintk("vino_capture_stop():\n");
2201
2202         spin_lock_irqsave(&vcs->capture_lock, flags);
2203
2204         /* unset capturing to stop queue processing */
2205         vcs->capturing = 0;
2206
2207         spin_lock_irqsave(&vino_drvdata->vino_lock, flags2);
2208
2209         vino_dma_stop(vcs);
2210         vino_clear_interrupt(vcs);
2211
2212         spin_unlock_irqrestore(&vino_drvdata->vino_lock, flags2);
2213
2214         /* remove all items from the queue */
2215         if (vino_queue_get_incoming(&vcs->fb_queue, &incoming)) {
2216                 dprintk("vino_capture_stop(): "
2217                         "vino_queue_get_incoming() failed\n");
2218                 goto out;
2219         }
2220         while (incoming > 0) {
2221                 vino_queue_transfer(&vcs->fb_queue);
2222
2223                 if (vino_queue_get_incoming(&vcs->fb_queue, &incoming)) {
2224                         dprintk("vino_capture_stop(): "
2225                                 "vino_queue_get_incoming() failed\n");
2226                         goto out;
2227                 }
2228         }
2229
2230         if (vino_queue_get_outgoing(&vcs->fb_queue, &outgoing)) {
2231                 dprintk("vino_capture_stop(): "
2232                         "vino_queue_get_outgoing() failed\n");
2233                 goto out;
2234         }
2235         while (outgoing > 0) {
2236                 vino_queue_remove(&vcs->fb_queue, &id);
2237
2238                 if (vino_queue_get_outgoing(&vcs->fb_queue, &outgoing)) {
2239                         dprintk("vino_capture_stop(): "
2240                                 "vino_queue_get_outgoing() failed\n");
2241                         goto out;
2242                 }
2243         }
2244
2245 out:
2246         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2247 }
2248
2249 #if 0
2250 static int vino_capture_failed(struct vino_channel_settings *vcs)
2251 {
2252         struct vino_framebuffer *fb;
2253         unsigned long flags;
2254         unsigned int i;
2255         int ret;
2256
2257         dprintk("vino_capture_failed():\n");
2258
2259         spin_lock_irqsave(&vino_drvdata->vino_lock, flags);
2260
2261         vino_dma_stop(vcs);
2262         vino_clear_interrupt(vcs);
2263
2264         spin_unlock_irqrestore(&vino_drvdata->vino_lock, flags);
2265
2266         ret = vino_queue_get_incoming(&vcs->fb_queue, &i);
2267         if (ret == VINO_QUEUE_ERROR) {
2268                 dprintk("vino_queue_get_incoming() failed\n");
2269                 return -EINVAL;
2270         }
2271         if (i == 0) {
2272                 /* no buffers to process */
2273                 return 0;
2274         }
2275
2276         fb = vino_queue_peek(&vcs->fb_queue, &i);
2277         if (fb == NULL) {
2278                 dprintk("vino_queue_peek() failed\n");
2279                 return -EINVAL;
2280         }
2281
2282         spin_lock_irqsave(&fb->state_lock, flags);
2283         if (fb->state == VINO_FRAMEBUFFER_IN_USE) {
2284                 fb->state = VINO_FRAMEBUFFER_UNUSED;
2285                 vino_queue_transfer(&vcs->fb_queue);
2286                 vino_queue_remove(&vcs->fb_queue, &i);
2287                 /* we should actually discard the newest frame,
2288                  * but who cares ... */
2289         }
2290         spin_unlock_irqrestore(&fb->state_lock, flags);
2291
2292         return 0;
2293 }
2294 #endif
2295
2296 static void vino_skip_frame(struct vino_channel_settings *vcs)
2297 {
2298         struct vino_framebuffer *fb;
2299         unsigned long flags;
2300         unsigned int id;
2301
2302         spin_lock_irqsave(&vcs->capture_lock, flags);
2303         fb = vino_queue_peek(&vcs->fb_queue, &id);
2304         if (!fb) {
2305                 spin_unlock_irqrestore(&vcs->capture_lock, flags);
2306                 dprintk("vino_skip_frame(): vino_queue_peek() failed!\n");
2307                 return;
2308         }
2309         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2310
2311         spin_lock_irqsave(&fb->state_lock, flags);
2312         fb->state = VINO_FRAMEBUFFER_UNUSED;
2313         spin_unlock_irqrestore(&fb->state_lock, flags);
2314
2315         vino_capture_next(vcs, 0);
2316 }
2317
2318 static void vino_frame_done(struct vino_channel_settings *vcs)
2319 {
2320         struct vino_framebuffer *fb;
2321         unsigned long flags;
2322
2323         spin_lock_irqsave(&vcs->capture_lock, flags);
2324         fb = vino_queue_transfer(&vcs->fb_queue);
2325         if (!fb) {
2326                 spin_unlock_irqrestore(&vcs->capture_lock, flags);
2327                 dprintk("vino_frame_done(): vino_queue_transfer() failed!\n");
2328                 return;
2329         }
2330         spin_unlock_irqrestore(&vcs->capture_lock, flags);
2331
2332         fb->frame_counter = vcs->int_data.frame_counter;
2333         memcpy(&fb->timestamp, &vcs->int_data.timestamp,
2334                sizeof(struct timeval));
2335
2336         spin_lock_irqsave(&fb->state_lock, flags);
2337         if (fb->state == VINO_FRAMEBUFFER_IN_USE)
2338                 fb->state = VINO_FRAMEBUFFER_READY;
2339         spin_unlock_irqrestore(&fb->state_lock, flags);
2340
2341         wake_up(&vcs->fb_queue.frame_wait_queue);
2342
2343         vino_capture_next(vcs, 0);
2344 }
2345
2346 static void vino_capture_tasklet(unsigned long channel) {
2347         struct vino_channel_settings *vcs;
2348
2349         vcs = (channel == VINO_CHANNEL_A)
2350                 ? &vino_drvdata->a : &vino_drvdata->b;
2351
2352         if (vcs->int_data.skip)
2353                 vcs->int_data.skip_count++;
2354
2355         if (vcs->int_data.skip && (vcs->int_data.skip_count
2356                                    <= VINO_MAX_FRAME_SKIP_COUNT)) {
2357                 vino_skip_frame(vcs);
2358         } else {
2359                 vcs->int_data.skip_count = 0;
2360                 vino_frame_done(vcs);
2361         }
2362 }
2363
2364 static irqreturn_t vino_interrupt(int irq, void *dev_id)
2365 {
2366         u32 ctrl, intr;
2367         unsigned int fc_a, fc_b;
2368         int handled_a = 0, skip_a = 0, done_a = 0;
2369         int handled_b = 0, skip_b = 0, done_b = 0;
2370
2371 #ifdef VINO_DEBUG_INT
2372         int loop = 0;
2373         unsigned int line_count = vino->a.line_count,
2374                 page_index = vino->a.page_index,
2375                 field_counter = vino->a.field_counter,
2376                 start_desc_tbl = vino->a.start_desc_tbl,
2377                 next_4_desc = vino->a.next_4_desc;
2378         unsigned int line_count_2,
2379                 page_index_2,
2380                 field_counter_2,
2381                 start_desc_tbl_2,
2382                 next_4_desc_2;
2383 #endif
2384
2385         spin_lock(&vino_drvdata->vino_lock);
2386
2387         while ((intr = vino->intr_status)) {
2388                 fc_a = vino->a.field_counter >> 1;
2389                 fc_b = vino->b.field_counter >> 1;
2390
2391                 /* handle error-interrupts in some special way ?
2392                  * --> skips frames */
2393                 if (intr & VINO_INTSTAT_A) {
2394                         if (intr & VINO_INTSTAT_A_EOF) {
2395                                 vino_drvdata->a.field++;
2396                                 if (vino_drvdata->a.field > 1) {
2397                                         vino_dma_stop(&vino_drvdata->a);
2398                                         vino_clear_interrupt(&vino_drvdata->a);
2399                                         vino_drvdata->a.field = 0;
2400                                         done_a = 1;
2401                                 } else {
2402                                         if (vino->a.page_index
2403                                             != vino_drvdata->a.line_size) {
2404                                                 vino->a.line_count = 0;
2405                                                 vino->a.page_index =
2406                                                         vino_drvdata->
2407                                                         a.line_size;
2408                                                 vino->a.next_4_desc =
2409                                                         vino->a.start_desc_tbl;
2410                                         }
2411                                 }
2412                                 dprintk("channel A end-of-field "
2413                                         "interrupt: %04x\n", intr);
2414                         } else {
2415                                 vino_dma_stop(&vino_drvdata->a);
2416                                 vino_clear_interrupt(&vino_drvdata->a);
2417                                 vino_drvdata->a.field = 0;
2418                                 skip_a = 1;
2419                                 dprintk("channel A error interrupt: %04x\n",
2420                                         intr);
2421                         }
2422
2423 #ifdef VINO_DEBUG_INT
2424                         line_count_2 = vino->a.line_count;
2425                         page_index_2 = vino->a.page_index;
2426                         field_counter_2 = vino->a.field_counter;
2427                         start_desc_tbl_2 = vino->a.start_desc_tbl;
2428                         next_4_desc_2 = vino->a.next_4_desc;
2429
2430                         printk("intr = %04x, loop = %d, field = %d\n",
2431                                intr, loop, vino_drvdata->a.field);
2432                         printk("1- line count = %04d, page index = %04d, "
2433                                "start = %08x, next = %08x\n"
2434                                "   fieldc = %d, framec = %d\n",
2435                                line_count, page_index, start_desc_tbl,
2436                                next_4_desc, field_counter, fc_a);
2437                         printk("12-line count = %04d, page index = %04d, "
2438                                "   start = %08x, next = %08x\n",
2439                                line_count_2, page_index_2, start_desc_tbl_2,
2440                                next_4_desc_2);
2441
2442                         if (done_a)
2443                                 printk("\n");
2444 #endif
2445                 }
2446
2447                 if (intr & VINO_INTSTAT_B) {
2448                         if (intr & VINO_INTSTAT_B_EOF) {
2449                                 vino_drvdata->b.field++;
2450                                 if (vino_drvdata->b.field > 1) {
2451                                         vino_dma_stop(&vino_drvdata->b);
2452                                         vino_clear_interrupt(&vino_drvdata->b);
2453                                         vino_drvdata->b.field = 0;
2454                                         done_b = 1;
2455                                 }
2456                                 dprintk("channel B end-of-field "
2457                                         "interrupt: %04x\n", intr);
2458                         } else {
2459                                 vino_dma_stop(&vino_drvdata->b);
2460                                 vino_clear_interrupt(&vino_drvdata->b);
2461                                 vino_drvdata->b.field = 0;
2462                                 skip_b = 1;
2463                                 dprintk("channel B error interrupt: %04x\n",
2464                                         intr);
2465                         }
2466                 }
2467
2468                 /* Always remember to clear interrupt status.
2469                  * Disable VINO interrupts while we do this. */
2470                 ctrl = vino->control;
2471                 vino->control = ctrl & ~(VINO_CTRL_A_INT | VINO_CTRL_B_INT);
2472                 vino->intr_status = ~intr;
2473                 vino->control = ctrl;
2474
2475                 spin_unlock(&vino_drvdata->vino_lock);
2476
2477                 if ((!handled_a) && (done_a || skip_a)) {
2478                         if (!skip_a) {
2479                                 do_gettimeofday(&vino_drvdata->
2480                                                 a.int_data.timestamp);
2481                                 vino_drvdata->a.int_data.frame_counter = fc_a;
2482                         }
2483                         vino_drvdata->a.int_data.skip = skip_a;
2484
2485                         dprintk("channel A %s, interrupt: %d\n",
2486                                 skip_a ? "skipping frame" : "frame done",
2487                                 intr);
2488                         tasklet_hi_schedule(&vino_tasklet_a);
2489                         handled_a = 1;
2490                 }
2491
2492                 if ((!handled_b) && (done_b || skip_b)) {
2493                         if (!skip_b) {
2494                                 do_gettimeofday(&vino_drvdata->
2495                                                 b.int_data.timestamp);
2496                                 vino_drvdata->b.int_data.frame_counter = fc_b;
2497                         }
2498                         vino_drvdata->b.int_data.skip = skip_b;
2499
2500                         dprintk("channel B %s, interrupt: %d\n",
2501                                 skip_b ? "skipping frame" : "frame done",
2502                                 intr);
2503                         tasklet_hi_schedule(&vino_tasklet_b);
2504                         handled_b = 1;
2505                 }
2506
2507 #ifdef VINO_DEBUG_INT
2508                 loop++;
2509 #endif
2510                 spin_lock(&vino_drvdata->vino_lock);
2511         }
2512
2513         spin_unlock(&vino_drvdata->vino_lock);
2514
2515         return IRQ_HANDLED;
2516 }
2517
2518 /* VINO video input management */
2519
2520 static int vino_get_saa7191_input(int input)
2521 {
2522         switch (input) {
2523         case VINO_INPUT_COMPOSITE:
2524                 return SAA7191_INPUT_COMPOSITE;
2525         case VINO_INPUT_SVIDEO:
2526                 return SAA7191_INPUT_SVIDEO;
2527         default:
2528                 printk(KERN_ERR "VINO: vino_get_saa7191_input(): "
2529                        "invalid input!\n");
2530                 return -1;
2531         }
2532 }
2533
2534 /* execute with input_lock locked */
2535 static int vino_is_input_owner(struct vino_channel_settings *vcs)
2536 {
2537         switch(vcs->input) {
2538         case VINO_INPUT_COMPOSITE:
2539         case VINO_INPUT_SVIDEO:
2540                 return vino_drvdata->decoder_owner == vcs->channel;
2541         case VINO_INPUT_D1:
2542                 return vino_drvdata->camera_owner == vcs->channel;
2543         default:
2544                 return 0;
2545         }
2546 }
2547
2548 static int vino_acquire_input(struct vino_channel_settings *vcs)
2549 {
2550         unsigned long flags;
2551         int ret = 0;
2552
2553         dprintk("vino_acquire_input():\n");
2554
2555         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2556
2557         /* First try D1 and then SAA7191 */
2558         if (vino_drvdata->camera
2559             && (vino_drvdata->camera_owner == VINO_NO_CHANNEL)) {
2560                 vino_drvdata->camera_owner = vcs->channel;
2561                 vcs->input = VINO_INPUT_D1;
2562                 vcs->data_norm = VINO_DATA_NORM_D1;
2563         } else if (vino_drvdata->decoder
2564                    && (vino_drvdata->decoder_owner == VINO_NO_CHANNEL)) {
2565                 int input;
2566                 int data_norm;
2567                 v4l2_std_id norm;
2568
2569                 input = VINO_INPUT_COMPOSITE;
2570
2571                 ret = decoder_call(video, s_routing,
2572                                 vino_get_saa7191_input(input), 0, 0);
2573                 if (ret) {
2574                         ret = -EINVAL;
2575                         goto out;
2576                 }
2577
2578                 spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2579
2580                 /* Don't hold spinlocks while auto-detecting norm
2581                  * as it may take a while... */
2582
2583                 ret = decoder_call(video, querystd, &norm);
2584                 if (!ret) {
2585                         for (data_norm = 0; data_norm < 3; data_norm++) {
2586                                 if (vino_data_norms[data_norm].std & norm)
2587                                         break;
2588                         }
2589                         if (data_norm == 3)
2590                                 data_norm = VINO_DATA_NORM_PAL;
2591                         ret = decoder_call(core, s_std, norm);
2592                 }
2593
2594                 spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2595
2596                 if (ret) {
2597                         ret = -EINVAL;
2598                         goto out;
2599                 }
2600
2601                 vino_drvdata->decoder_owner = vcs->channel;
2602
2603                 vcs->input = input;
2604                 vcs->data_norm = data_norm;
2605         } else {
2606                 vcs->input = (vcs->channel == VINO_CHANNEL_A) ?
2607                         vino_drvdata->b.input : vino_drvdata->a.input;
2608                 vcs->data_norm = (vcs->channel == VINO_CHANNEL_A) ?
2609                         vino_drvdata->b.data_norm : vino_drvdata->a.data_norm;
2610         }
2611
2612         if (vcs->input == VINO_INPUT_NONE) {
2613                 ret = -ENODEV;
2614                 goto out;
2615         }
2616
2617         vino_set_default_clipping(vcs);
2618         vino_set_default_scaling(vcs);
2619         vino_set_default_framerate(vcs);
2620
2621         dprintk("vino_acquire_input(): %s\n", vino_inputs[vcs->input].name);
2622
2623 out:
2624         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2625
2626         return ret;
2627 }
2628
2629 static int vino_set_input(struct vino_channel_settings *vcs, int input)
2630 {
2631         struct vino_channel_settings *vcs2 = (vcs->channel == VINO_CHANNEL_A) ?
2632                 &vino_drvdata->b : &vino_drvdata->a;
2633         unsigned long flags;
2634         int ret = 0;
2635
2636         dprintk("vino_set_input():\n");
2637
2638         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2639
2640         if (vcs->input == input)
2641                 goto out;
2642
2643         switch (input) {
2644         case VINO_INPUT_COMPOSITE:
2645         case VINO_INPUT_SVIDEO:
2646                 if (!vino_drvdata->decoder) {
2647                         ret = -EINVAL;
2648                         goto out;
2649                 }
2650
2651                 if (vino_drvdata->decoder_owner == VINO_NO_CHANNEL) {
2652                         vino_drvdata->decoder_owner = vcs->channel;
2653                 }
2654
2655                 if (vino_drvdata->decoder_owner == vcs->channel) {
2656                         int data_norm;
2657                         v4l2_std_id norm;
2658
2659                         ret = decoder_call(video, s_routing,
2660                                         vino_get_saa7191_input(input), 0, 0);
2661                         if (ret) {
2662                                 vino_drvdata->decoder_owner = VINO_NO_CHANNEL;
2663                                 ret = -EINVAL;
2664                                 goto out;
2665                         }
2666
2667                         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2668
2669                         /* Don't hold spinlocks while auto-detecting norm
2670                          * as it may take a while... */
2671
2672                         ret = decoder_call(video, querystd, &norm);
2673                         if (!ret) {
2674                                 for (data_norm = 0; data_norm < 3; data_norm++) {
2675                                         if (vino_data_norms[data_norm].std & norm)
2676                                                 break;
2677                                 }
2678                                 if (data_norm == 3)
2679                                         data_norm = VINO_DATA_NORM_PAL;
2680                                 ret = decoder_call(core, s_std, norm);
2681                         }
2682
2683                         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2684
2685                         if (ret) {
2686                                 vino_drvdata->decoder_owner = VINO_NO_CHANNEL;
2687                                 ret = -EINVAL;
2688                                 goto out;
2689                         }
2690
2691                         vcs->input = input;
2692                         vcs->data_norm = data_norm;
2693                 } else {
2694                         if (input != vcs2->input) {
2695                                 ret = -EBUSY;
2696                                 goto out;
2697                         }
2698
2699                         vcs->input = input;
2700                         vcs->data_norm = vcs2->data_norm;
2701                 }
2702
2703                 if (vino_drvdata->camera_owner == vcs->channel) {
2704                         /* Transfer the ownership or release the input */
2705                         if (vcs2->input == VINO_INPUT_D1) {
2706                                 vino_drvdata->camera_owner = vcs2->channel;
2707                         } else {
2708                                 vino_drvdata->camera_owner = VINO_NO_CHANNEL;
2709                         }
2710                 }
2711                 break;
2712         case VINO_INPUT_D1:
2713                 if (!vino_drvdata->camera) {
2714                         ret = -EINVAL;
2715                         goto out;
2716                 }
2717
2718                 if (vino_drvdata->camera_owner == VINO_NO_CHANNEL)
2719                         vino_drvdata->camera_owner = vcs->channel;
2720
2721                 if (vino_drvdata->decoder_owner == vcs->channel) {
2722                         /* Transfer the ownership or release the input */
2723                         if ((vcs2->input == VINO_INPUT_COMPOSITE) ||
2724                                  (vcs2->input == VINO_INPUT_SVIDEO)) {
2725                                 vino_drvdata->decoder_owner = vcs2->channel;
2726                         } else {
2727                                 vino_drvdata->decoder_owner = VINO_NO_CHANNEL;
2728                         }
2729                 }
2730
2731                 vcs->input = input;
2732                 vcs->data_norm = VINO_DATA_NORM_D1;
2733                 break;
2734         default:
2735                 ret = -EINVAL;
2736                 goto out;
2737         }
2738
2739         vino_set_default_clipping(vcs);
2740         vino_set_default_scaling(vcs);
2741         vino_set_default_framerate(vcs);
2742
2743         dprintk("vino_set_input(): %s\n", vino_inputs[vcs->input].name);
2744
2745 out:
2746         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2747
2748         return ret;
2749 }
2750
2751 static void vino_release_input(struct vino_channel_settings *vcs)
2752 {
2753         struct vino_channel_settings *vcs2 = (vcs->channel == VINO_CHANNEL_A) ?
2754                 &vino_drvdata->b : &vino_drvdata->a;
2755         unsigned long flags;
2756
2757         dprintk("vino_release_input():\n");
2758
2759         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2760
2761         /* Release ownership of the channel
2762          * and if the other channel takes input from
2763          * the same source, transfer the ownership */
2764         if (vino_drvdata->camera_owner == vcs->channel) {
2765                 if (vcs2->input == VINO_INPUT_D1) {
2766                         vino_drvdata->camera_owner = vcs2->channel;
2767                 } else {
2768                         vino_drvdata->camera_owner = VINO_NO_CHANNEL;
2769                 }
2770         } else if (vino_drvdata->decoder_owner == vcs->channel) {
2771                 if ((vcs2->input == VINO_INPUT_COMPOSITE) ||
2772                          (vcs2->input == VINO_INPUT_SVIDEO)) {
2773                         vino_drvdata->decoder_owner = vcs2->channel;
2774                 } else {
2775                         vino_drvdata->decoder_owner = VINO_NO_CHANNEL;
2776                 }
2777         }
2778         vcs->input = VINO_INPUT_NONE;
2779
2780         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2781 }
2782
2783 /* execute with input_lock locked */
2784 static int vino_set_data_norm(struct vino_channel_settings *vcs,
2785                               unsigned int data_norm,
2786                               unsigned long *flags)
2787 {
2788         int err = 0;
2789
2790         if (data_norm == vcs->data_norm)
2791                 return 0;
2792
2793         switch (vcs->input) {
2794         case VINO_INPUT_D1:
2795                 /* only one "norm" supported */
2796                 if (data_norm != VINO_DATA_NORM_D1)
2797                         return -EINVAL;
2798                 break;
2799         case VINO_INPUT_COMPOSITE:
2800         case VINO_INPUT_SVIDEO: {
2801                 v4l2_std_id norm;
2802
2803                 if ((data_norm != VINO_DATA_NORM_PAL)
2804                     && (data_norm != VINO_DATA_NORM_NTSC)
2805                     && (data_norm != VINO_DATA_NORM_SECAM))
2806                         return -EINVAL;
2807
2808                 spin_unlock_irqrestore(&vino_drvdata->input_lock, *flags);
2809
2810                 /* Don't hold spinlocks while setting norm
2811                  * as it may take a while... */
2812
2813                 norm = vino_data_norms[data_norm].std;
2814                 err = decoder_call(core, s_std, norm);
2815
2816                 spin_lock_irqsave(&vino_drvdata->input_lock, *flags);
2817
2818                 if (err)
2819                         goto out;
2820
2821                 vcs->data_norm = data_norm;
2822
2823                 vino_set_default_clipping(vcs);
2824                 vino_set_default_scaling(vcs);
2825                 vino_set_default_framerate(vcs);
2826                 break;
2827         }
2828         default:
2829                 return -EINVAL;
2830         }
2831
2832 out:
2833         return err;
2834 }
2835
2836 /* V4L2 helper functions */
2837
2838 static int vino_find_data_format(__u32 pixelformat)
2839 {
2840         int i;
2841
2842         for (i = 0; i < VINO_DATA_FMT_COUNT; i++) {
2843                 if (vino_data_formats[i].pixelformat == pixelformat)
2844                         return i;
2845         }
2846
2847         return VINO_DATA_FMT_NONE;
2848 }
2849
2850 static int vino_int_enum_input(struct vino_channel_settings *vcs, __u32 index)
2851 {
2852         int input = VINO_INPUT_NONE;
2853         unsigned long flags;
2854
2855         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2856         if (vino_drvdata->decoder && vino_drvdata->camera) {
2857                 switch (index) {
2858                 case 0:
2859                         input = VINO_INPUT_COMPOSITE;
2860                         break;
2861                 case 1:
2862                         input = VINO_INPUT_SVIDEO;
2863                         break;
2864                 case 2:
2865                         input = VINO_INPUT_D1;
2866                         break;
2867                 }
2868         } else if (vino_drvdata->decoder) {
2869                 switch (index) {
2870                 case 0:
2871                         input = VINO_INPUT_COMPOSITE;
2872                         break;
2873                 case 1:
2874                         input = VINO_INPUT_SVIDEO;
2875                         break;
2876                 }
2877         } else if (vino_drvdata->camera) {
2878                 switch (index) {
2879                 case 0:
2880                         input = VINO_INPUT_D1;
2881                         break;
2882                 }
2883         }
2884         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2885
2886         return input;
2887 }
2888
2889 /* execute with input_lock locked */
2890 static __u32 vino_find_input_index(struct vino_channel_settings *vcs)
2891 {
2892         __u32 index = 0;
2893         // FIXME: detect when no inputs available
2894
2895         if (vino_drvdata->decoder && vino_drvdata->camera) {
2896                 switch (vcs->input) {
2897                 case VINO_INPUT_COMPOSITE:
2898                         index = 0;
2899                         break;
2900                 case VINO_INPUT_SVIDEO:
2901                         index = 1;
2902                         break;
2903                 case VINO_INPUT_D1:
2904                         index = 2;
2905                         break;
2906                 }
2907         } else if (vino_drvdata->decoder) {
2908                 switch (vcs->input) {
2909                 case VINO_INPUT_COMPOSITE:
2910                         index = 0;
2911                         break;
2912                 case VINO_INPUT_SVIDEO:
2913                         index = 1;
2914                         break;
2915                 }
2916         } else if (vino_drvdata->camera) {
2917                 switch (vcs->input) {
2918                 case VINO_INPUT_D1:
2919                         index = 0;
2920                         break;
2921                 }
2922         }
2923
2924         return index;
2925 }
2926
2927 /* V4L2 ioctls */
2928
2929 static int vino_querycap(struct file *file, void *__fh,
2930                 struct v4l2_capability *cap)
2931 {
2932         memset(cap, 0, sizeof(struct v4l2_capability));
2933
2934         strcpy(cap->driver, vino_driver_name);
2935         strcpy(cap->card, vino_driver_description);
2936         strcpy(cap->bus_info, vino_bus_name);
2937         cap->version = VINO_VERSION_CODE;
2938         cap->capabilities =
2939                 V4L2_CAP_VIDEO_CAPTURE |
2940                 V4L2_CAP_STREAMING;
2941         // V4L2_CAP_OVERLAY, V4L2_CAP_READWRITE
2942         return 0;
2943 }
2944
2945 static int vino_enum_input(struct file *file, void *__fh,
2946                                struct v4l2_input *i)
2947 {
2948         struct vino_channel_settings *vcs = video_drvdata(file);
2949         __u32 index = i->index;
2950         int input;
2951         dprintk("requested index = %d\n", index);
2952
2953         input = vino_int_enum_input(vcs, index);
2954         if (input == VINO_INPUT_NONE)
2955                 return -EINVAL;
2956
2957         memset(i, 0, sizeof(struct v4l2_input));
2958
2959         i->index = index;
2960         i->type = V4L2_INPUT_TYPE_CAMERA;
2961         i->std = vino_inputs[input].std;
2962         strcpy(i->name, vino_inputs[input].name);
2963
2964         if (input == VINO_INPUT_COMPOSITE || input == VINO_INPUT_SVIDEO)
2965                 decoder_call(video, g_input_status, &i->status);
2966         return 0;
2967 }
2968
2969 static int vino_g_input(struct file *file, void *__fh,
2970                              unsigned int *i)
2971 {
2972         struct vino_channel_settings *vcs = video_drvdata(file);
2973         __u32 index;
2974         int input;
2975         unsigned long flags;
2976
2977         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2978         input = vcs->input;
2979         index = vino_find_input_index(vcs);
2980         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2981
2982         dprintk("input = %d\n", input);
2983
2984         if (input == VINO_INPUT_NONE) {
2985                 return -EINVAL;
2986         }
2987
2988         *i = index;
2989
2990         return 0;
2991 }
2992
2993 static int vino_s_input(struct file *file, void *__fh,
2994                              unsigned int i)
2995 {
2996         struct vino_channel_settings *vcs = video_drvdata(file);
2997         int input;
2998         dprintk("requested input = %d\n", i);
2999
3000         input = vino_int_enum_input(vcs, i);
3001         if (input == VINO_INPUT_NONE)
3002                 return -EINVAL;
3003
3004         return vino_set_input(vcs, input);
3005 }
3006
3007 static int vino_querystd(struct file *file, void *__fh,
3008                               v4l2_std_id *std)
3009 {
3010         struct vino_channel_settings *vcs = video_drvdata(file);
3011         unsigned long flags;
3012         int err = 0;
3013
3014         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3015
3016         switch (vcs->input) {
3017         case VINO_INPUT_D1:
3018                 *std = vino_inputs[vcs->input].std;
3019                 break;
3020         case VINO_INPUT_COMPOSITE:
3021         case VINO_INPUT_SVIDEO: {
3022                 decoder_call(video, querystd, std);
3023                 break;
3024         }
3025         default:
3026                 err = -EINVAL;
3027         }
3028
3029         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3030
3031         return err;
3032 }
3033
3034 static int vino_g_std(struct file *file, void *__fh,
3035                            v4l2_std_id *std)
3036 {
3037         struct vino_channel_settings *vcs = video_drvdata(file);
3038         unsigned long flags;
3039
3040         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3041
3042         *std = vino_data_norms[vcs->data_norm].std;
3043         dprintk("current standard = %d\n", vcs->data_norm);
3044
3045         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3046
3047         return 0;
3048 }
3049
3050 static int vino_s_std(struct file *file, void *__fh,
3051                            v4l2_std_id *std)
3052 {
3053         struct vino_channel_settings *vcs = video_drvdata(file);
3054         unsigned long flags;
3055         int ret = 0;
3056
3057         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3058
3059         if (!vino_is_input_owner(vcs)) {
3060                 ret = -EBUSY;
3061                 goto out;
3062         }
3063
3064         /* check if the standard is valid for the current input */
3065         if ((*std) & vino_inputs[vcs->input].std) {
3066                 dprintk("standard accepted\n");
3067
3068                 /* change the video norm for SAA7191
3069                  * and accept NTSC for D1 (do nothing) */
3070
3071                 if (vcs->input == VINO_INPUT_D1)
3072                         goto out;
3073
3074                 if ((*std) & V4L2_STD_PAL) {
3075                         ret = vino_set_data_norm(vcs, VINO_DATA_NORM_PAL,
3076                                                  &flags);
3077                 } else if ((*std) & V4L2_STD_NTSC) {
3078                         ret = vino_set_data_norm(vcs, VINO_DATA_NORM_NTSC,
3079                                                  &flags);
3080                 } else if ((*std) & V4L2_STD_SECAM) {
3081                         ret = vino_set_data_norm(vcs, VINO_DATA_NORM_SECAM,
3082                                                  &flags);
3083                 } else {
3084                         ret = -EINVAL;
3085                 }
3086
3087                 if (ret) {
3088                         ret = -EINVAL;
3089                 }
3090         } else {
3091                 ret = -EINVAL;
3092         }
3093
3094 out:
3095         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3096
3097         return ret;
3098 }
3099
3100 static int vino_enum_fmt_vid_cap(struct file *file, void *__fh,
3101                               struct v4l2_fmtdesc *fd)
3102 {
3103         dprintk("format index = %d\n", fd->index);
3104
3105         if (fd->index >= VINO_DATA_FMT_COUNT)
3106                 return -EINVAL;
3107         dprintk("format name = %s\n", vino_data_formats[fd->index].description);
3108
3109         fd->pixelformat = vino_data_formats[fd->index].pixelformat;
3110         strcpy(fd->description, vino_data_formats[fd->index].description);
3111         return 0;
3112 }
3113
3114 static int vino_try_fmt_vid_cap(struct file *file, void *__fh,
3115                              struct v4l2_format *f)
3116 {
3117         struct vino_channel_settings *vcs = video_drvdata(file);
3118         struct vino_channel_settings tempvcs;
3119         unsigned long flags;
3120         struct v4l2_pix_format *pf = &f->fmt.pix;
3121
3122         dprintk("requested: w = %d, h = %d\n",
3123                         pf->width, pf->height);
3124
3125         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3126         memcpy(&tempvcs, vcs, sizeof(struct vino_channel_settings));
3127         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3128
3129         tempvcs.data_format = vino_find_data_format(pf->pixelformat);
3130         if (tempvcs.data_format == VINO_DATA_FMT_NONE) {
3131                 tempvcs.data_format = VINO_DATA_FMT_GREY;
3132                 pf->pixelformat =
3133                         vino_data_formats[tempvcs.data_format].
3134                         pixelformat;
3135         }
3136
3137         /* data format must be set before clipping/scaling */
3138         vino_set_scaling(&tempvcs, pf->width, pf->height);
3139
3140         dprintk("data format = %s\n",
3141                         vino_data_formats[tempvcs.data_format].description);
3142
3143         pf->width = (tempvcs.clipping.right - tempvcs.clipping.left) /
3144                 tempvcs.decimation;
3145         pf->height = (tempvcs.clipping.bottom - tempvcs.clipping.top) /
3146                 tempvcs.decimation;
3147
3148         pf->field = V4L2_FIELD_INTERLACED;
3149         pf->bytesperline = tempvcs.line_size;
3150         pf->sizeimage = tempvcs.line_size *
3151                 (tempvcs.clipping.bottom - tempvcs.clipping.top) /
3152                 tempvcs.decimation;
3153         pf->colorspace =
3154                 vino_data_formats[tempvcs.data_format].colorspace;
3155
3156         pf->priv = 0;
3157         return 0;
3158 }
3159
3160 static int vino_g_fmt_vid_cap(struct file *file, void *__fh,
3161                            struct v4l2_format *f)
3162 {
3163         struct vino_channel_settings *vcs = video_drvdata(file);
3164         unsigned long flags;
3165         struct v4l2_pix_format *pf = &f->fmt.pix;
3166
3167         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3168
3169         pf->width = (vcs->clipping.right - vcs->clipping.left) /
3170                 vcs->decimation;
3171         pf->height = (vcs->clipping.bottom - vcs->clipping.top) /
3172                 vcs->decimation;
3173         pf->pixelformat =
3174                 vino_data_formats[vcs->data_format].pixelformat;
3175
3176         pf->field = V4L2_FIELD_INTERLACED;
3177         pf->bytesperline = vcs->line_size;
3178         pf->sizeimage = vcs->line_size *
3179                 (vcs->clipping.bottom - vcs->clipping.top) /
3180                 vcs->decimation;
3181         pf->colorspace =
3182                 vino_data_formats[vcs->data_format].colorspace;
3183
3184         pf->priv = 0;
3185
3186         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3187         return 0;
3188 }
3189
3190 static int vino_s_fmt_vid_cap(struct file *file, void *__fh,
3191                            struct v4l2_format *f)
3192 {
3193         struct vino_channel_settings *vcs = video_drvdata(file);
3194         int data_format;
3195         unsigned long flags;
3196         struct v4l2_pix_format *pf = &f->fmt.pix;
3197
3198         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3199
3200         data_format = vino_find_data_format(pf->pixelformat);
3201
3202         if (data_format == VINO_DATA_FMT_NONE) {
3203                 vcs->data_format = VINO_DATA_FMT_GREY;
3204                 pf->pixelformat =
3205                         vino_data_formats[vcs->data_format].
3206                         pixelformat;
3207         } else {
3208                 vcs->data_format = data_format;
3209         }
3210
3211         /* data format must be set before clipping/scaling */
3212         vino_set_scaling(vcs, pf->width, pf->height);
3213
3214         dprintk("data format = %s\n",
3215                vino_data_formats[vcs->data_format].description);
3216
3217         pf->width = vcs->clipping.right - vcs->clipping.left;
3218         pf->height = vcs->clipping.bottom - vcs->clipping.top;
3219
3220         pf->field = V4L2_FIELD_INTERLACED;
3221         pf->bytesperline = vcs->line_size;
3222         pf->sizeimage = vcs->line_size *
3223                 (vcs->clipping.bottom - vcs->clipping.top) /
3224                 vcs->decimation;
3225         pf->colorspace =
3226                 vino_data_formats[vcs->data_format].colorspace;
3227
3228         pf->priv = 0;
3229
3230         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3231         return 0;
3232 }
3233
3234 static int vino_cropcap(struct file *file, void *__fh,
3235                              struct v4l2_cropcap *ccap)
3236 {
3237         struct vino_channel_settings *vcs = video_drvdata(file);
3238         const struct vino_data_norm *norm;
3239         unsigned long flags;
3240
3241         switch (ccap->type) {
3242         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
3243                 spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3244
3245                 norm = &vino_data_norms[vcs->data_norm];
3246
3247                 spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3248
3249                 ccap->bounds.left = 0;
3250                 ccap->bounds.top = 0;
3251                 ccap->bounds.width = norm->width;
3252                 ccap->bounds.height = norm->height;
3253                 memcpy(&ccap->defrect, &ccap->bounds,
3254                        sizeof(struct v4l2_rect));
3255
3256                 ccap->pixelaspect.numerator = 1;
3257                 ccap->pixelaspect.denominator = 1;
3258                 break;
3259         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3260         default:
3261                 return -EINVAL;
3262         }
3263
3264         return 0;
3265 }
3266
3267 static int vino_g_crop(struct file *file, void *__fh,
3268                             struct v4l2_crop *c)
3269 {
3270         struct vino_channel_settings *vcs = video_drvdata(file);
3271         unsigned long flags;
3272
3273         switch (c->type) {
3274         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
3275                 spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3276
3277                 c->c.left = vcs->clipping.left;
3278                 c->c.top = vcs->clipping.top;
3279                 c->c.width = vcs->clipping.right - vcs->clipping.left;
3280                 c->c.height = vcs->clipping.bottom - vcs->clipping.top;
3281
3282                 spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3283                 break;
3284         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3285         default:
3286                 return -EINVAL;
3287         }
3288
3289         return 0;
3290 }
3291
3292 static int vino_s_crop(struct file *file, void *__fh,
3293                             struct v4l2_crop *c)
3294 {
3295         struct vino_channel_settings *vcs = video_drvdata(file);
3296         unsigned long flags;
3297
3298         switch (c->type) {
3299         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
3300                 spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3301
3302                 vino_set_clipping(vcs, c->c.left, c->c.top,
3303                                   c->c.width, c->c.height);
3304
3305                 spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3306                 break;
3307         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3308         default:
3309                 return -EINVAL;
3310         }
3311
3312         return 0;
3313 }
3314
3315 static int vino_g_parm(struct file *file, void *__fh,
3316                             struct v4l2_streamparm *sp)
3317 {
3318         struct vino_channel_settings *vcs = video_drvdata(file);
3319         unsigned long flags;
3320         struct v4l2_captureparm *cp = &sp->parm.capture;
3321
3322         cp->capability = V4L2_CAP_TIMEPERFRAME;
3323         cp->timeperframe.numerator = 1;
3324
3325         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3326
3327         cp->timeperframe.denominator = vcs->fps;
3328
3329         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3330
3331         /* TODO: cp->readbuffers = xxx; */
3332
3333         return 0;
3334 }
3335
3336 static int vino_s_parm(struct file *file, void *__fh,
3337                             struct v4l2_streamparm *sp)
3338 {
3339         struct vino_channel_settings *vcs = video_drvdata(file);
3340         unsigned long flags;
3341         struct v4l2_captureparm *cp = &sp->parm.capture;
3342
3343         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3344
3345         if ((cp->timeperframe.numerator == 0) ||
3346             (cp->timeperframe.denominator == 0)) {
3347                 /* reset framerate */
3348                 vino_set_default_framerate(vcs);
3349         } else {
3350                 vino_set_framerate(vcs, cp->timeperframe.denominator /
3351                                    cp->timeperframe.numerator);
3352         }
3353
3354         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3355
3356         return 0;
3357 }
3358
3359 static int vino_reqbufs(struct file *file, void *__fh,
3360                              struct v4l2_requestbuffers *rb)
3361 {
3362         struct vino_channel_settings *vcs = video_drvdata(file);
3363
3364         if (vcs->reading)
3365                 return -EBUSY;
3366
3367         /* TODO: check queue type */
3368         if (rb->memory != V4L2_MEMORY_MMAP) {
3369                 dprintk("type not mmap\n");
3370                 return -EINVAL;
3371         }
3372
3373         dprintk("count = %d\n", rb->count);
3374         if (rb->count > 0) {
3375                 if (vino_is_capturing(vcs)) {
3376                         dprintk("busy, capturing\n");
3377                         return -EBUSY;
3378                 }
3379
3380                 if (vino_queue_has_mapped_buffers(&vcs->fb_queue)) {
3381                         dprintk("busy, buffers still mapped\n");
3382                         return -EBUSY;
3383                 } else {
3384                         vcs->streaming = 0;
3385                         vino_queue_free(&vcs->fb_queue);
3386                         vino_queue_init(&vcs->fb_queue, &rb->count);
3387                 }
3388         } else {
3389                 vcs->streaming = 0;
3390                 vino_capture_stop(vcs);
3391                 vino_queue_free(&vcs->fb_queue);
3392         }
3393
3394         return 0;
3395 }
3396
3397 static void vino_v4l2_get_buffer_status(struct vino_channel_settings *vcs,
3398                                         struct vino_framebuffer *fb,
3399                                         struct v4l2_buffer *b)
3400 {
3401         if (vino_queue_outgoing_contains(&vcs->fb_queue,
3402                                          fb->id)) {
3403                 b->flags &= ~V4L2_BUF_FLAG_QUEUED;
3404                 b->flags |= V4L2_BUF_FLAG_DONE;
3405         } else if (vino_queue_incoming_contains(&vcs->fb_queue,
3406                                        fb->id)) {
3407                 b->flags &= ~V4L2_BUF_FLAG_DONE;
3408                 b->flags |= V4L2_BUF_FLAG_QUEUED;
3409         } else {
3410                 b->flags &= ~(V4L2_BUF_FLAG_DONE |
3411                               V4L2_BUF_FLAG_QUEUED);
3412         }
3413
3414         b->flags &= ~(V4L2_BUF_FLAG_TIMECODE);
3415
3416         if (fb->map_count > 0)
3417                 b->flags |= V4L2_BUF_FLAG_MAPPED;
3418
3419         b->index = fb->id;
3420         b->memory = (vcs->fb_queue.type == VINO_MEMORY_MMAP) ?
3421                 V4L2_MEMORY_MMAP : V4L2_MEMORY_USERPTR;
3422         b->m.offset = fb->offset;
3423         b->bytesused = fb->data_size;
3424         b->length = fb->size;
3425         b->field = V4L2_FIELD_INTERLACED;
3426         b->sequence = fb->frame_counter;
3427         memcpy(&b->timestamp, &fb->timestamp,
3428                sizeof(struct timeval));
3429         // b->input ?
3430
3431         dprintk("buffer %d: length = %d, bytesused = %d, offset = %d\n",
3432                 fb->id, fb->size, fb->data_size, fb->offset);
3433 }
3434
3435 static int vino_querybuf(struct file *file, void *__fh,
3436                               struct v4l2_buffer *b)
3437 {
3438         struct vino_channel_settings *vcs = video_drvdata(file);
3439         struct vino_framebuffer *fb;
3440
3441         if (vcs->reading)
3442                 return -EBUSY;
3443
3444         /* TODO: check queue type */
3445         if (b->index >= vino_queue_get_length(&vcs->fb_queue)) {
3446                 dprintk("invalid index = %d\n",
3447                        b->index);
3448                 return -EINVAL;
3449         }
3450
3451         fb = vino_queue_get_buffer(&vcs->fb_queue,
3452                                    b->index);
3453         if (fb == NULL) {
3454                 dprintk("vino_queue_get_buffer() failed");
3455                 return -EINVAL;
3456         }
3457
3458         vino_v4l2_get_buffer_status(vcs, fb, b);
3459
3460         return 0;
3461 }
3462
3463 static int vino_qbuf(struct file *file, void *__fh,
3464                           struct v4l2_buffer *b)
3465 {
3466         struct vino_channel_settings *vcs = video_drvdata(file);
3467         struct vino_framebuffer *fb;
3468         int ret;
3469
3470         if (vcs->reading)
3471                 return -EBUSY;
3472
3473         /* TODO: check queue type */
3474         if (b->memory != V4L2_MEMORY_MMAP) {
3475                 dprintk("type not mmap\n");
3476                 return -EINVAL;
3477         }
3478
3479         fb = vino_capture_enqueue(vcs, b->index);
3480         if (fb == NULL)
3481                 return -EINVAL;
3482
3483         vino_v4l2_get_buffer_status(vcs, fb, b);
3484
3485         if (vcs->streaming) {
3486                 ret = vino_capture_next(vcs, 1);
3487                 if (ret)
3488                         return ret;
3489         }
3490
3491         return 0;
3492 }
3493
3494 static int vino_dqbuf(struct file *file, void *__fh,
3495                            struct v4l2_buffer *b)
3496 {
3497         struct vino_channel_settings *vcs = video_drvdata(file);
3498         unsigned int nonblocking = file->f_flags & O_NONBLOCK;
3499         struct vino_framebuffer *fb;
3500         unsigned int incoming, outgoing;
3501         int err;
3502
3503         if (vcs->reading)
3504                 return -EBUSY;
3505
3506         /* TODO: check queue type */
3507
3508         err = vino_queue_get_incoming(&vcs->fb_queue, &incoming);
3509         if (err) {
3510                 dprintk("vino_queue_get_incoming() failed\n");
3511                 return -EINVAL;
3512         }
3513         err = vino_queue_get_outgoing(&vcs->fb_queue, &outgoing);
3514         if (err) {
3515                 dprintk("vino_queue_get_outgoing() failed\n");
3516                 return -EINVAL;
3517         }
3518
3519         dprintk("incoming = %d, outgoing = %d\n", incoming, outgoing);
3520
3521         if (outgoing == 0) {
3522                 if (incoming == 0) {
3523                         dprintk("no incoming or outgoing buffers\n");
3524                         return -EINVAL;
3525                 }
3526                 if (nonblocking) {
3527                         dprintk("non-blocking I/O was selected and "
3528                                 "there are no buffers to dequeue\n");
3529                         return -EAGAIN;
3530                 }
3531
3532                 err = vino_wait_for_frame(vcs);
3533                 if (err) {
3534                         err = vino_wait_for_frame(vcs);
3535                         if (err) {
3536                                 /* interrupted or no frames captured because of
3537                                  * frame skipping */
3538                                 /* vino_capture_failed(vcs); */
3539                                 return -EIO;
3540                         }
3541                 }
3542         }
3543
3544         fb = vino_queue_remove(&vcs->fb_queue, &b->index);
3545         if (fb == NULL) {
3546                 dprintk("vino_queue_remove() failed\n");
3547                 return -EINVAL;
3548         }
3549
3550         err = vino_check_buffer(vcs, fb);
3551
3552         vino_v4l2_get_buffer_status(vcs, fb, b);
3553
3554         if (err)
3555                 return -EIO;
3556
3557         return 0;
3558 }
3559
3560 static int vino_streamon(struct file *file, void *__fh,
3561                 enum v4l2_buf_type i)
3562 {
3563         struct vino_channel_settings *vcs = video_drvdata(file);
3564         unsigned int incoming;
3565         int ret;
3566         if (vcs->reading)
3567                 return -EBUSY;
3568
3569         if (vcs->streaming)
3570                 return 0;
3571
3572         // TODO: check queue type
3573
3574         if (vino_queue_get_length(&vcs->fb_queue) < 1) {
3575                 dprintk("no buffers allocated\n");
3576                 return -EINVAL;
3577         }
3578
3579         ret = vino_queue_get_incoming(&vcs->fb_queue, &incoming);
3580         if (ret) {
3581                 dprintk("vino_queue_get_incoming() failed\n");
3582                 return -EINVAL;
3583         }
3584
3585         vcs->streaming = 1;
3586
3587         if (incoming > 0) {
3588                 ret = vino_capture_next(vcs, 1);
3589                 if (ret) {
3590                         vcs->streaming = 0;
3591
3592                         dprintk("couldn't start capture\n");
3593                         return -EINVAL;
3594                 }
3595         }
3596
3597         return 0;
3598 }
3599
3600 static int vino_streamoff(struct file *file, void *__fh,
3601                 enum v4l2_buf_type i)
3602 {
3603         struct vino_channel_settings *vcs = video_drvdata(file);
3604         if (vcs->reading)
3605                 return -EBUSY;
3606
3607         if (!vcs->streaming)
3608                 return 0;
3609
3610         vcs->streaming = 0;
3611         vino_capture_stop(vcs);
3612
3613         return 0;
3614 }
3615
3616 static int vino_queryctrl(struct file *file, void *__fh,
3617                                struct v4l2_queryctrl *queryctrl)
3618 {
3619         struct vino_channel_settings *vcs = video_drvdata(file);
3620         unsigned long flags;
3621         int i;
3622         int err = 0;
3623
3624         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3625
3626         switch (vcs->input) {
3627         case VINO_INPUT_D1:
3628                 for (i = 0; i < VINO_INDYCAM_V4L2_CONTROL_COUNT; i++) {
3629                         if (vino_indycam_v4l2_controls[i].id ==
3630                             queryctrl->id) {
3631                                 memcpy(queryctrl,
3632                                        &vino_indycam_v4l2_controls[i],
3633                                        sizeof(struct v4l2_queryctrl));
3634                                 queryctrl->reserved[0] = 0;
3635                                 goto found;
3636                         }
3637                 }
3638
3639                 err =  -EINVAL;
3640                 break;
3641         case VINO_INPUT_COMPOSITE:
3642         case VINO_INPUT_SVIDEO:
3643                 for (i = 0; i < VINO_SAA7191_V4L2_CONTROL_COUNT; i++) {
3644                         if (vino_saa7191_v4l2_controls[i].id ==
3645                             queryctrl->id) {
3646                                 memcpy(queryctrl,
3647                                        &vino_saa7191_v4l2_controls[i],
3648                                        sizeof(struct v4l2_queryctrl));
3649                                 queryctrl->reserved[0] = 0;
3650                                 goto found;
3651                         }
3652                 }
3653
3654                 err =  -EINVAL;
3655                 break;
3656         default:
3657                 err =  -EINVAL;
3658         }
3659
3660  found:
3661         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3662
3663         return err;
3664 }
3665
3666 static int vino_g_ctrl(struct file *file, void *__fh,
3667                             struct v4l2_control *control)
3668 {
3669         struct vino_channel_settings *vcs = video_drvdata(file);
3670         unsigned long flags;
3671         int i;
3672         int err = 0;
3673
3674         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3675
3676         switch (vcs->input) {
3677         case VINO_INPUT_D1: {
3678                 err = -EINVAL;
3679                 for (i = 0; i < VINO_INDYCAM_V4L2_CONTROL_COUNT; i++) {
3680                         if (vino_indycam_v4l2_controls[i].id == control->id) {
3681                                 err = 0;
3682                                 break;
3683                         }
3684                 }
3685
3686                 if (err)
3687                         goto out;
3688
3689                 err = camera_call(core, g_ctrl, control);
3690                 if (err)
3691                         err = -EINVAL;
3692                 break;
3693         }
3694         case VINO_INPUT_COMPOSITE:
3695         case VINO_INPUT_SVIDEO: {
3696                 err = -EINVAL;
3697                 for (i = 0; i < VINO_SAA7191_V4L2_CONTROL_COUNT; i++) {
3698                         if (vino_saa7191_v4l2_controls[i].id == control->id) {
3699                                 err = 0;
3700                                 break;
3701                         }
3702                 }
3703
3704                 if (err)
3705                         goto out;
3706
3707                 err = decoder_call(core, g_ctrl, control);
3708                 if (err)
3709                         err = -EINVAL;
3710                 break;
3711         }
3712         default:
3713                 err =  -EINVAL;
3714         }
3715
3716 out:
3717         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3718
3719         return err;
3720 }
3721
3722 static int vino_s_ctrl(struct file *file, void *__fh,
3723                             struct v4l2_control *control)
3724 {
3725         struct vino_channel_settings *vcs = video_drvdata(file);
3726         unsigned long flags;
3727         int i;
3728         int err = 0;
3729
3730         spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3731
3732         if (!vino_is_input_owner(vcs)) {
3733                 err = -EBUSY;
3734                 goto out;
3735         }
3736
3737         switch (vcs->input) {
3738         case VINO_INPUT_D1: {
3739                 err = -EINVAL;
3740                 for (i = 0; i < VINO_INDYCAM_V4L2_CONTROL_COUNT; i++) {
3741                         if (vino_indycam_v4l2_controls[i].id == control->id) {
3742                                 err = 0;
3743                                 break;
3744                         }
3745                 }
3746                 if (err)
3747                         goto out;
3748                 if (control->value < vino_indycam_v4l2_controls[i].minimum ||
3749                     control->value > vino_indycam_v4l2_controls[i].maximum) {
3750                         err = -ERANGE;
3751                         goto out;
3752                 }
3753                 err = camera_call(core, s_ctrl, control);
3754                 if (err)
3755                         err = -EINVAL;
3756                 break;
3757         }
3758         case VINO_INPUT_COMPOSITE:
3759         case VINO_INPUT_SVIDEO: {
3760                 err = -EINVAL;
3761                 for (i = 0; i < VINO_SAA7191_V4L2_CONTROL_COUNT; i++) {
3762                         if (vino_saa7191_v4l2_controls[i].id == control->id) {
3763                                 err = 0;
3764                                 break;
3765                         }
3766                 }
3767                 if (err)
3768                         goto out;
3769                 if (control->value < vino_saa7191_v4l2_controls[i].minimum ||
3770                     control->value > vino_saa7191_v4l2_controls[i].maximum) {
3771                         err = -ERANGE;
3772                         goto out;
3773                 }
3774
3775                 err = decoder_call(core, s_ctrl, control);
3776                 if (err)
3777                         err = -EINVAL;
3778                 break;
3779         }
3780         default:
3781                 err =  -EINVAL;
3782         }
3783
3784 out:
3785         spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3786
3787         return err;
3788 }
3789
3790 /* File operations */
3791
3792 static int vino_open(struct file *file)
3793 {
3794         struct vino_channel_settings *vcs = video_drvdata(file);
3795         int ret = 0;
3796         dprintk("open(): channel = %c\n",
3797                (vcs->channel == VINO_CHANNEL_A) ? 'A' : 'B');
3798
3799         mutex_lock(&vcs->mutex);
3800
3801         if (vcs->users) {
3802                 dprintk("open(): driver busy\n");
3803                 ret = -EBUSY;
3804                 goto out;
3805         }
3806
3807         ret = vino_acquire_input(vcs);
3808         if (ret) {
3809                 dprintk("open(): vino_acquire_input() failed\n");
3810                 goto out;
3811         }
3812
3813         vcs->users++;
3814
3815  out:
3816         mutex_unlock(&vcs->mutex);
3817
3818         dprintk("open(): %s!\n", ret ? "failed" : "complete");
3819
3820         return ret;
3821 }
3822
3823 static int vino_close(struct file *file)
3824 {
3825         struct vino_channel_settings *vcs = video_drvdata(file);
3826         dprintk("close():\n");
3827
3828         mutex_lock(&vcs->mutex);
3829
3830         vcs->users--;
3831
3832         if (!vcs->users) {
3833                 vino_release_input(vcs);
3834
3835                 /* stop DMA and free buffers */
3836                 vino_capture_stop(vcs);
3837                 vino_queue_free(&vcs->fb_queue);
3838         }
3839
3840         mutex_unlock(&vcs->mutex);
3841
3842         return 0;
3843 }
3844
3845 static void vino_vm_open(struct vm_area_struct *vma)
3846 {
3847         struct vino_framebuffer *fb = vma->vm_private_data;
3848
3849         fb->map_count++;
3850         dprintk("vino_vm_open(): count = %d\n", fb->map_count);
3851 }
3852
3853 static void vino_vm_close(struct vm_area_struct *vma)
3854 {
3855         struct vino_framebuffer *fb = vma->vm_private_data;
3856
3857         fb->map_count--;
3858         dprintk("vino_vm_close(): count = %d\n", fb->map_count);
3859 }
3860
3861 static const struct vm_operations_struct vino_vm_ops = {
3862         .open   = vino_vm_open,
3863         .close  = vino_vm_close,
3864 };
3865
3866 static int vino_mmap(struct file *file, struct vm_area_struct *vma)
3867 {
3868         struct vino_channel_settings *vcs = video_drvdata(file);
3869
3870         unsigned long start = vma->vm_start;
3871         unsigned long size = vma->vm_end - vma->vm_start;
3872         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
3873
3874         struct vino_framebuffer *fb = NULL;
3875         unsigned int i, length;
3876         int ret = 0;
3877
3878         dprintk("mmap():\n");
3879
3880         // TODO: reject mmap if already mapped
3881
3882         if (mutex_lock_interruptible(&vcs->mutex))
3883                 return -EINTR;
3884
3885         if (vcs->reading) {
3886                 ret = -EBUSY;
3887                 goto out;
3888         }
3889
3890         // TODO: check queue type
3891
3892         if (!(vma->vm_flags & VM_WRITE)) {
3893                 dprintk("mmap(): app bug: PROT_WRITE please\n");
3894                 ret = -EINVAL;
3895                 goto out;
3896         }
3897         if (!(vma->vm_flags & VM_SHARED)) {
3898                 dprintk("mmap(): app bug: MAP_SHARED please\n");
3899                 ret = -EINVAL;
3900                 goto out;
3901         }
3902
3903         /* find the correct buffer using offset */
3904         length = vino_queue_get_length(&vcs->fb_queue);
3905         if (length == 0) {
3906                 dprintk("mmap(): queue not initialized\n");
3907                 ret = -EINVAL;
3908                 goto out;
3909         }
3910
3911         for (i = 0; i < length; i++) {
3912                 fb = vino_queue_get_buffer(&vcs->fb_queue, i);
3913                 if (fb == NULL) {
3914                         dprintk("mmap(): vino_queue_get_buffer() failed\n");
3915                         ret = -EINVAL;
3916                         goto out;
3917                 }
3918
3919                 if (fb->offset == offset)
3920                         goto found;
3921         }
3922
3923         dprintk("mmap(): invalid offset = %lu\n", offset);
3924         ret = -EINVAL;
3925         goto out;
3926
3927 found:
3928         dprintk("mmap(): buffer = %d\n", i);
3929
3930         if (size > (fb->desc_table.page_count * PAGE_SIZE)) {
3931                 dprintk("mmap(): failed: size = %lu > %lu\n",
3932                         size, fb->desc_table.page_count * PAGE_SIZE);
3933                 ret = -EINVAL;
3934                 goto out;
3935         }
3936
3937         for (i = 0; i < fb->desc_table.page_count; i++) {
3938                 unsigned long pfn =
3939                         virt_to_phys((void *)fb->desc_table.virtual[i]) >>
3940                         PAGE_SHIFT;
3941
3942                 if (size < PAGE_SIZE)
3943                         break;
3944
3945                 // protection was: PAGE_READONLY
3946                 if (remap_pfn_range(vma, start, pfn, PAGE_SIZE,
3947                                     vma->vm_page_prot)) {
3948                         dprintk("mmap(): remap_pfn_range() failed\n");
3949                         ret = -EAGAIN;
3950                         goto out;
3951                 }
3952
3953                 start += PAGE_SIZE;
3954                 size -= PAGE_SIZE;
3955         }
3956
3957         fb->map_count = 1;
3958
3959         vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED;
3960         vma->vm_flags &= ~VM_IO;
3961         vma->vm_private_data = fb;
3962         vma->vm_file = file;
3963         vma->vm_ops = &vino_vm_ops;
3964
3965 out:
3966         mutex_unlock(&vcs->mutex);
3967
3968         return ret;
3969 }
3970
3971 static unsigned int vino_poll(struct file *file, poll_table *pt)
3972 {
3973         struct vino_channel_settings *vcs = video_drvdata(file);
3974         unsigned int outgoing;
3975         unsigned int ret = 0;
3976
3977         // lock mutex (?)
3978         // TODO: this has to be corrected for different read modes
3979
3980         dprintk("poll():\n");
3981
3982         if (vino_queue_get_outgoing(&vcs->fb_queue, &outgoing)) {
3983                 dprintk("poll(): vino_queue_get_outgoing() failed\n");
3984                 ret = POLLERR;
3985                 goto error;
3986         }
3987         if (outgoing > 0)
3988                 goto over;
3989
3990         poll_wait(file, &vcs->fb_queue.frame_wait_queue, pt);
3991
3992         if (vino_queue_get_outgoing(&vcs->fb_queue, &outgoing)) {
3993                 dprintk("poll(): vino_queue_get_outgoing() failed\n");
3994                 ret = POLLERR;
3995                 goto error;
3996         }
3997
3998 over:
3999         dprintk("poll(): data %savailable\n",
4000                 (outgoing > 0) ? "" : "not ");
4001
4002         if (outgoing > 0)
4003                 ret = POLLIN | POLLRDNORM;
4004
4005 error:
4006         return ret;
4007 }
4008
4009 static long vino_ioctl(struct file *file,
4010                       unsigned int cmd, unsigned long arg)
4011 {
4012         struct vino_channel_settings *vcs = video_drvdata(file);
4013         long ret;
4014
4015         if (mutex_lock_interruptible(&vcs->mutex))
4016                 return -EINTR;
4017
4018         ret = video_ioctl2(file, cmd, arg);
4019
4020         mutex_unlock(&vcs->mutex);
4021
4022         return ret;
4023 }
4024
4025 /* Initialization and cleanup */
4026
4027 /* __initdata */
4028 static int vino_init_stage;
4029
4030 const struct v4l2_ioctl_ops vino_ioctl_ops = {
4031         .vidioc_enum_fmt_vid_cap     = vino_enum_fmt_vid_cap,
4032         .vidioc_g_fmt_vid_cap        = vino_g_fmt_vid_cap,
4033         .vidioc_s_fmt_vid_cap        = vino_s_fmt_vid_cap,
4034         .vidioc_try_fmt_vid_cap      = vino_try_fmt_vid_cap,
4035         .vidioc_querycap             = vino_querycap,
4036         .vidioc_enum_input           = vino_enum_input,
4037         .vidioc_g_input              = vino_g_input,
4038         .vidioc_s_input              = vino_s_input,
4039         .vidioc_g_std                = vino_g_std,
4040         .vidioc_s_std                = vino_s_std,
4041         .vidioc_querystd             = vino_querystd,
4042         .vidioc_cropcap              = vino_cropcap,
4043         .vidioc_s_crop               = vino_s_crop,
4044         .vidioc_g_crop               = vino_g_crop,
4045         .vidioc_s_parm               = vino_s_parm,
4046         .vidioc_g_parm               = vino_g_parm,
4047         .vidioc_reqbufs              = vino_reqbufs,
4048         .vidioc_querybuf             = vino_querybuf,
4049         .vidioc_qbuf                 = vino_qbuf,
4050         .vidioc_dqbuf                = vino_dqbuf,
4051         .vidioc_streamon             = vino_streamon,
4052         .vidioc_streamoff            = vino_streamoff,
4053         .vidioc_queryctrl            = vino_queryctrl,
4054         .vidioc_g_ctrl               = vino_g_ctrl,
4055         .vidioc_s_ctrl               = vino_s_ctrl,
4056 };
4057
4058 static const struct v4l2_file_operations vino_fops = {
4059         .owner          = THIS_MODULE,
4060         .open           = vino_open,
4061         .release        = vino_close,
4062         .unlocked_ioctl = vino_ioctl,
4063         .mmap           = vino_mmap,
4064         .poll           = vino_poll,
4065 };
4066
4067 static struct video_device vdev_template = {
4068         .name           = "NOT SET",
4069         .fops           = &vino_fops,
4070         .ioctl_ops      = &vino_ioctl_ops,
4071         .tvnorms        = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM,
4072 };
4073
4074 static void vino_module_cleanup(int stage)
4075 {
4076         switch(stage) {
4077         case 11:
4078                 video_unregister_device(vino_drvdata->b.vdev);
4079                 vino_drvdata->b.vdev = NULL;
4080         case 10:
4081                 video_unregister_device(vino_drvdata->a.vdev);
4082                 vino_drvdata->a.vdev = NULL;
4083         case 9:
4084                 i2c_del_adapter(&vino_i2c_adapter);
4085         case 8:
4086                 free_irq(SGI_VINO_IRQ, NULL);
4087         case 7:
4088                 if (vino_drvdata->b.vdev) {
4089                         video_device_release(vino_drvdata->b.vdev);
4090                         vino_drvdata->b.vdev = NULL;
4091                 }
4092         case 6:
4093                 if (vino_drvdata->a.vdev) {
4094                         video_device_release(vino_drvdata->a.vdev);
4095                         vino_drvdata->a.vdev = NULL;
4096                 }
4097         case 5:
4098                 /* all entries in dma_cpu dummy table have the same address */
4099                 dma_unmap_single(NULL,
4100                                  vino_drvdata->dummy_desc_table.dma_cpu[0],
4101                                  PAGE_SIZE, DMA_FROM_DEVICE);
4102                 dma_free_coherent(NULL, VINO_DUMMY_DESC_COUNT
4103                                   * sizeof(dma_addr_t),
4104                                   (void *)vino_drvdata->
4105                                   dummy_desc_table.dma_cpu,
4106                                   vino_drvdata->dummy_desc_table.dma);
4107         case 4:
4108                 free_page(vino_drvdata->dummy_page);
4109         case 3:
4110                 v4l2_device_unregister(&vino_drvdata->v4l2_dev);
4111         case 2:
4112                 kfree(vino_drvdata);
4113         case 1:
4114                 iounmap(vino);
4115         case 0:
4116                 break;
4117         default:
4118                 dprintk("vino_module_cleanup(): invalid cleanup stage = %d\n",
4119                         stage);
4120         }
4121 }
4122
4123 static int vino_probe(void)
4124 {
4125         unsigned long rev_id;
4126
4127         if (ip22_is_fullhouse()) {
4128                 printk(KERN_ERR "VINO doesn't exist in IP22 Fullhouse\n");
4129                 return -ENODEV;
4130         }
4131
4132         if (!(sgimc->systemid & SGIMC_SYSID_EPRESENT)) {
4133                 printk(KERN_ERR "VINO is not found (EISA BUS not present)\n");
4134                 return -ENODEV;
4135         }
4136
4137         vino = (struct sgi_vino *)ioremap(VINO_BASE, sizeof(struct sgi_vino));
4138         if (!vino) {
4139                 printk(KERN_ERR "VINO: ioremap() failed\n");
4140                 return -EIO;
4141         }
4142         vino_init_stage++;
4143
4144         if (get_dbe(rev_id, &(vino->rev_id))) {
4145                 printk(KERN_ERR "Failed to read VINO revision register\n");
4146                 vino_module_cleanup(vino_init_stage);
4147                 return -ENODEV;
4148         }
4149
4150         if (VINO_ID_VALUE(rev_id) != VINO_CHIP_ID) {
4151                 printk(KERN_ERR "Unknown VINO chip ID (Rev/ID: 0x%02lx)\n",
4152                        rev_id);
4153                 vino_module_cleanup(vino_init_stage);
4154                 return -ENODEV;
4155         }
4156
4157         printk(KERN_INFO "VINO revision %ld found\n", VINO_REV_NUM(rev_id));
4158
4159         return 0;
4160 }
4161
4162 static int vino_init(void)
4163 {
4164         dma_addr_t dma_dummy_address;
4165         int err;
4166         int i;
4167
4168         vino_drvdata = kzalloc(sizeof(struct vino_settings), GFP_KERNEL);
4169         if (!vino_drvdata) {
4170                 vino_module_cleanup(vino_init_stage);
4171                 return -ENOMEM;
4172         }
4173         vino_init_stage++;
4174         strlcpy(vino_drvdata->v4l2_dev.name, "vino",
4175                         sizeof(vino_drvdata->v4l2_dev.name));
4176         err = v4l2_device_register(NULL, &vino_drvdata->v4l2_dev);
4177         if (err)
4178                 return err;
4179         vino_init_stage++;
4180
4181         /* create a dummy dma descriptor */
4182         vino_drvdata->dummy_page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
4183         if (!vino_drvdata->dummy_page) {
4184                 vino_module_cleanup(vino_init_stage);
4185                 return -ENOMEM;
4186         }
4187         vino_init_stage++;
4188
4189         // TODO: use page_count in dummy_desc_table
4190
4191         vino_drvdata->dummy_desc_table.dma_cpu =
4192                 dma_alloc_coherent(NULL,
4193                 VINO_DUMMY_DESC_COUNT * sizeof(dma_addr_t),
4194                 &vino_drvdata->dummy_desc_table.dma,
4195                 GFP_KERNEL | GFP_DMA);
4196         if (!vino_drvdata->dummy_desc_table.dma_cpu) {
4197                 vino_module_cleanup(vino_init_stage);
4198                 return -ENOMEM;
4199         }
4200         vino_init_stage++;
4201
4202         dma_dummy_address = dma_map_single(NULL,
4203                                            (void *)vino_drvdata->dummy_page,
4204                                         PAGE_SIZE, DMA_FROM_DEVICE);
4205         for (i = 0; i < VINO_DUMMY_DESC_COUNT; i++) {
4206                 vino_drvdata->dummy_desc_table.dma_cpu[i] = dma_dummy_address;
4207         }
4208
4209         /* initialize VINO */
4210
4211         vino->control = 0;
4212         vino->a.next_4_desc = vino_drvdata->dummy_desc_table.dma;
4213         vino->b.next_4_desc = vino_drvdata->dummy_desc_table.dma;
4214         udelay(VINO_DESC_FETCH_DELAY);
4215
4216         vino->intr_status = 0;
4217
4218         vino->a.fifo_thres = VINO_FIFO_THRESHOLD_DEFAULT;
4219         vino->b.fifo_thres = VINO_FIFO_THRESHOLD_DEFAULT;
4220
4221         return 0;
4222 }
4223
4224 static int vino_init_channel_settings(struct vino_channel_settings *vcs,
4225                                  unsigned int channel, const char *name)
4226 {
4227         vcs->channel = channel;
4228         vcs->input = VINO_INPUT_NONE;
4229         vcs->alpha = 0;
4230         vcs->users = 0;
4231         vcs->data_format = VINO_DATA_FMT_GREY;
4232         vcs->data_norm = VINO_DATA_NORM_NTSC;
4233         vcs->decimation = 1;
4234         vino_set_default_clipping(vcs);
4235         vino_set_default_framerate(vcs);
4236
4237         vcs->capturing = 0;
4238
4239         mutex_init(&vcs->mutex);
4240         spin_lock_init(&vcs->capture_lock);
4241
4242         mutex_init(&vcs->fb_queue.queue_mutex);
4243         spin_lock_init(&vcs->fb_queue.queue_lock);
4244         init_waitqueue_head(&vcs->fb_queue.frame_wait_queue);
4245
4246         vcs->vdev = video_device_alloc();
4247         if (!vcs->vdev) {
4248                 vino_module_cleanup(vino_init_stage);
4249                 return -ENOMEM;
4250         }
4251         vino_init_stage++;
4252
4253         memcpy(vcs->vdev, &vdev_template,
4254                sizeof(struct video_device));
4255         strcpy(vcs->vdev->name, name);
4256         vcs->vdev->release = video_device_release;
4257         vcs->vdev->v4l2_dev = &vino_drvdata->v4l2_dev;
4258
4259         video_set_drvdata(vcs->vdev, vcs);
4260
4261         return 0;
4262 }
4263
4264 static int __init vino_module_init(void)
4265 {
4266         int ret;
4267
4268         printk(KERN_INFO "SGI VINO driver version %s\n",
4269                VINO_MODULE_VERSION);
4270
4271         ret = vino_probe();
4272         if (ret)
4273                 return ret;
4274
4275         ret = vino_init();
4276         if (ret)
4277                 return ret;
4278
4279         /* initialize data structures */
4280
4281         spin_lock_init(&vino_drvdata->vino_lock);
4282         spin_lock_init(&vino_drvdata->input_lock);
4283
4284         ret = vino_init_channel_settings(&vino_drvdata->a, VINO_CHANNEL_A,
4285                                     vino_vdev_name_a);
4286         if (ret)
4287                 return ret;
4288
4289         ret = vino_init_channel_settings(&vino_drvdata->b, VINO_CHANNEL_B,
4290                                     vino_vdev_name_b);
4291         if (ret)
4292                 return ret;
4293
4294         /* initialize hardware and register V4L devices */
4295
4296         ret = request_irq(SGI_VINO_IRQ, vino_interrupt, 0,
4297                 vino_driver_description, NULL);
4298         if (ret) {
4299                 printk(KERN_ERR "VINO: requesting IRQ %02d failed\n",
4300                        SGI_VINO_IRQ);
4301                 vino_module_cleanup(vino_init_stage);
4302                 return -EAGAIN;
4303         }
4304         vino_init_stage++;
4305
4306         ret = i2c_add_adapter(&vino_i2c_adapter);
4307         if (ret) {
4308                 printk(KERN_ERR "VINO I2C bus registration failed\n");
4309                 vino_module_cleanup(vino_init_stage);
4310                 return ret;
4311         }
4312         i2c_set_adapdata(&vino_i2c_adapter, &vino_drvdata->v4l2_dev);
4313         vino_init_stage++;
4314
4315         ret = video_register_device(vino_drvdata->a.vdev,
4316                                     VFL_TYPE_GRABBER, -1);
4317         if (ret < 0) {
4318                 printk(KERN_ERR "VINO channel A Video4Linux-device "
4319                        "registration failed\n");
4320                 vino_module_cleanup(vino_init_stage);
4321                 return -EINVAL;
4322         }
4323         vino_init_stage++;
4324
4325         ret = video_register_device(vino_drvdata->b.vdev,
4326                                     VFL_TYPE_GRABBER, -1);
4327         if (ret < 0) {
4328                 printk(KERN_ERR "VINO channel B Video4Linux-device "
4329                        "registration failed\n");
4330                 vino_module_cleanup(vino_init_stage);
4331                 return -EINVAL;
4332         }
4333         vino_init_stage++;
4334
4335         vino_drvdata->decoder =
4336                 v4l2_i2c_new_subdev(&vino_drvdata->v4l2_dev, &vino_i2c_adapter,
4337                                "saa7191", "saa7191", 0, I2C_ADDRS(0x45));
4338         vino_drvdata->camera =
4339                 v4l2_i2c_new_subdev(&vino_drvdata->v4l2_dev, &vino_i2c_adapter,
4340                                "indycam", "indycam", 0, I2C_ADDRS(0x2b));
4341
4342         dprintk("init complete!\n");
4343
4344         return 0;
4345 }
4346
4347 static void __exit vino_module_exit(void)
4348 {
4349         dprintk("exiting, stage = %d ...\n", vino_init_stage);
4350         vino_module_cleanup(vino_init_stage);
4351         dprintk("cleanup complete, exit!\n");
4352 }
4353
4354 module_init(vino_module_init);
4355 module_exit(vino_module_exit);