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