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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / media / video / arv.c
blobc94a4d0f280475c987b306d9716596c35d9256b7
1 /*
2 * Colour AR M64278(VGA) driver for Video4Linux
3 *
4 * Copyright (C) 2003 Takeo Takahashi <takahashi.takeo@renesas.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Some code is taken from AR driver sample program for M3T-M32700UT.
12 *
13 * AR driver sample (M32R SDK):
14 * Copyright (c) 2003 RENESAS TECHNOROGY CORPORATION
15 * AND RENESAS SOLUTIONS CORPORATION
16 * All Rights Reserved.
17 *
18 * 2003-09-01: Support w3cam by Takeo Takahashi
19 */
20
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/delay.h>
24 #include <linux/errno.h>
25 #include <linux/fs.h>
26 #include <linux/kernel.h>
27 #include <linux/slab.h>
28 #include <linux/mm.h>
29 #include <linux/sched.h>
30 #include <linux/videodev.h>
31 #include <media/v4l2-common.h>
32 #include <linux/mutex.h>
33
34 #include <asm/uaccess.h>
35 #include <asm/m32r.h>
36 #include <asm/io.h>
37 #include <asm/dma.h>
38 #include <asm/byteorder.h>
39
40 #if 0
41 #define DEBUG(n, args...) printk(args)
42 #define CHECK_LOST 1
43 #else
44 #define DEBUG(n, args...)
45 #define CHECK_LOST 0
46 #endif
47
48 /*
49 * USE_INT is always 0, interrupt mode is not available
50 * on linux due to lack of speed
51 */
52 #define USE_INT 0 /* Don't modify */
53
54 #define VERSION "0.03"
55
56 #define ar_inl(addr) inl((unsigned long)(addr))
57 #define ar_outl(val, addr) outl((unsigned long)(val),(unsigned long)(addr))
58
59 extern struct cpuinfo_m32r boot_cpu_data;
60
61 /*
62 * CCD pixel size
63 * Note that M32700UT does not support CIF mode, but QVGA is
64 * supported by M32700UT hardware using VGA mode of AR LSI.
65 *
66 * Supported: VGA (Normal mode, Interlace mode)
67 * QVGA (Always Interlace mode of VGA)
68 *
69 */
70 #define AR_WIDTH_VGA 640
71 #define AR_HEIGHT_VGA 480
72 #define AR_WIDTH_QVGA 320
73 #define AR_HEIGHT_QVGA 240
74 #define MIN_AR_WIDTH AR_WIDTH_QVGA
75 #define MIN_AR_HEIGHT AR_HEIGHT_QVGA
76 #define MAX_AR_WIDTH AR_WIDTH_VGA
77 #define MAX_AR_HEIGHT AR_HEIGHT_VGA
78
79 /* bits & bytes per pixel */
80 #define AR_BITS_PER_PIXEL 16
81 #define AR_BYTES_PER_PIXEL (AR_BITS_PER_PIXEL/8)
82
83 /* line buffer size */
84 #define AR_LINE_BYTES_VGA (AR_WIDTH_VGA * AR_BYTES_PER_PIXEL)
85 #define AR_LINE_BYTES_QVGA (AR_WIDTH_QVGA * AR_BYTES_PER_PIXEL)
86 #define MAX_AR_LINE_BYTES AR_LINE_BYTES_VGA
87
88 /* frame size & type */
89 #define AR_FRAME_BYTES_VGA \
90 (AR_WIDTH_VGA * AR_HEIGHT_VGA * AR_BYTES_PER_PIXEL)
91 #define AR_FRAME_BYTES_QVGA \
92 (AR_WIDTH_QVGA * AR_HEIGHT_QVGA * AR_BYTES_PER_PIXEL)
93 #define MAX_AR_FRAME_BYTES \
94 (MAX_AR_WIDTH * MAX_AR_HEIGHT * AR_BYTES_PER_PIXEL)
95
96 #define AR_MAX_FRAME 15
97
98 /* capture size */
99 #define AR_SIZE_VGA 0
100 #define AR_SIZE_QVGA 1
101
102 /* capture mode */
103 #define AR_MODE_INTERLACE 0
104 #define AR_MODE_NORMAL 1
105
106 struct ar_device {
107 struct video_device *vdev;
108 unsigned int start_capture; /* duaring capture in INT. mode. */
109 #if USE_INT
110 unsigned char *line_buff; /* DMA line buffer */
111 #endif
112 unsigned char *frame[MAX_AR_HEIGHT]; /* frame data */
113 short size; /* capture size */
114 short mode; /* capture mode */
115 int width, height;
116 int frame_bytes, line_bytes;
117 wait_queue_head_t wait;
118 struct mutex lock;
119 };
120
121 static int video_nr = -1; /* video device number (first free) */
122 static unsigned char yuv[MAX_AR_FRAME_BYTES];
123
124 /* module parameters */
125 /* default frequency */
126 #define DEFAULT_FREQ 50 /* 50 or 75 (MHz) is available as BCLK */
127 static int freq = DEFAULT_FREQ; /* BCLK: available 50 or 70 (MHz) */
128 static int vga = 0; /* default mode(0:QVGA mode, other:VGA mode) */
129 static int vga_interlace = 0; /* 0 is normal mode for, else interlace mode */
130 module_param(freq, int, 0);
131 module_param(vga, int, 0);
132 module_param(vga_interlace, int, 0);
133
134 static int ar_initialize(struct video_device *dev);
135
136 static inline void wait_for_vsync(void)
137 {
138 while (ar_inl(ARVCR0) & ARVCR0_VDS) /* wait for VSYNC */
139 cpu_relax();
140 while (!(ar_inl(ARVCR0) & ARVCR0_VDS)) /* wait for VSYNC */
141 cpu_relax();
142 }
143
144 static inline void wait_acknowledge(void)
145 {
146 int i;
147
148 for (i = 0; i < 1000; i++)
149 cpu_relax();
150 while (ar_inl(PLDI2CSTS) & PLDI2CSTS_NOACK)
151 cpu_relax();
152 }
153
154 /*******************************************************************
155 * I2C functions
156 *******************************************************************/
157 void iic(int n, unsigned long addr, unsigned long data1, unsigned long data2,
158 unsigned long data3)
159 {
160 int i;
161
162 /* Slave Address */
163 ar_outl(addr, PLDI2CDATA);
164 wait_for_vsync();
165
166 /* Start */
167 ar_outl(1, PLDI2CCND);
168 wait_acknowledge();
169
170 /* Transfer data 1 */
171 ar_outl(data1, PLDI2CDATA);
172 wait_for_vsync();
173 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
174 wait_acknowledge();
175
176 /* Transfer data 2 */
177 ar_outl(data2, PLDI2CDATA);
178 wait_for_vsync();
179 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
180 wait_acknowledge();
181
182 if (n == 3) {
183 /* Transfer data 3 */
184 ar_outl(data3, PLDI2CDATA);
185 wait_for_vsync();
186 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
187 wait_acknowledge();
188 }
189
190 /* Stop */
191 for (i = 0; i < 100; i++)
192 cpu_relax();
193 ar_outl(2, PLDI2CCND);
194 ar_outl(2, PLDI2CCND);
195
196 while (ar_inl(PLDI2CSTS) & PLDI2CSTS_BB)
197 cpu_relax();
198 }
199
200
201 void init_iic(void)
202 {
203 DEBUG(1, "init_iic:\n");
204
205 /*
206 * ICU Setting (iic)
207 */
208 /* I2C Setting */
209 ar_outl(0x0, PLDI2CCR); /* I2CCR Disable */
210 ar_outl(0x0300, PLDI2CMOD); /* I2CMOD ACK/8b-data/7b-addr/auto */
211 ar_outl(0x1, PLDI2CACK); /* I2CACK ACK */
212
213 /* I2C CLK */
214 /* 50MH-100k */
215 if (freq == 75) {
216 ar_outl(369, PLDI2CFREQ); /* BCLK = 75MHz */
217 } else if (freq == 50) {
218 ar_outl(244, PLDI2CFREQ); /* BCLK = 50MHz */
219 } else {
220 ar_outl(244, PLDI2CFREQ); /* default: BCLK = 50MHz */
221 }
222 ar_outl(0x1, PLDI2CCR); /* I2CCR Enable */
223 }
224
225 /**************************************************************************
226 *
227 * Video4Linux Interface functions
228 *
229 **************************************************************************/
230
231 static inline void disable_dma(void)
232 {
233 ar_outl(0x8000, M32R_DMAEN_PORTL); /* disable DMA0 */
234 }
235
236 static inline void enable_dma(void)
237 {
238 ar_outl(0x8080, M32R_DMAEN_PORTL); /* enable DMA0 */
239 }
240
241 static inline void clear_dma_status(void)
242 {
243 ar_outl(0x8000, M32R_DMAEDET_PORTL); /* clear status */
244 }
245
246 static inline void wait_for_vertical_sync(int exp_line)
247 {
248 #if CHECK_LOST
249 int tmout = 10000; /* FIXME */
250 int l;
251
252 /*
253 * check HCOUNT because we cannot check vertical sync.
254 */
255 for (; tmout >= 0; tmout--) {
256 l = ar_inl(ARVHCOUNT);
257 if (l == exp_line)
258 break;
259 }
260 if (tmout < 0)
261 printk("arv: lost %d -> %d\n", exp_line, l);
262 #else
263 while (ar_inl(ARVHCOUNT) != exp_line)
264 cpu_relax();
265 #endif
266 }
267
268 static ssize_t ar_read(struct file *file, char *buf, size_t count, loff_t *ppos)
269 {
270 struct video_device *v = video_devdata(file);
271 struct ar_device *ar = v->priv;
272 long ret = ar->frame_bytes; /* return read bytes */
273 unsigned long arvcr1 = 0;
274 unsigned long flags;
275 unsigned char *p;
276 int h, w;
277 unsigned char *py, *pu, *pv;
278 #if ! USE_INT
279 int l;
280 #endif
281
282 DEBUG(1, "ar_read()\n");
283
284 if (ar->size == AR_SIZE_QVGA)
285 arvcr1 |= ARVCR1_QVGA;
286 if (ar->mode == AR_MODE_NORMAL)
287 arvcr1 |= ARVCR1_NORMAL;
288
289 mutex_lock(&ar->lock);
290
291 #if USE_INT
292 local_irq_save(flags);
293 disable_dma();
294 ar_outl(0xa1871300, M32R_DMA0CR0_PORTL);
295 ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
296
297 /* set AR FIFO address as source(BSEL5) */
298 ar_outl(ARDATA32, M32R_DMA0CSA_PORTL);
299 ar_outl(ARDATA32, M32R_DMA0RSA_PORTL);
300 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* destination addr. */
301 ar_outl(ar->line_buff, M32R_DMA0RDA_PORTL); /* reload address */
302 ar_outl(ar->line_bytes, M32R_DMA0CBCUT_PORTL); /* byte count (bytes) */
303 ar_outl(ar->line_bytes, M32R_DMA0RBCUT_PORTL); /* reload count (bytes) */
304
305 /*
306 * Okey , kicks AR LSI to invoke an interrupt
307 */
308 ar->start_capture = 0;
309 ar_outl(arvcr1 | ARVCR1_HIEN, ARVCR1);
310 local_irq_restore(flags);
311 /* .... AR interrupts .... */
312 interruptible_sleep_on(&ar->wait);
313 if (signal_pending(current)) {
314 printk("arv: interrupted while get frame data.\n");
315 ret = -EINTR;
316 goto out_up;
317 }
318 #else /* ! USE_INT */
319 /* polling */
320 ar_outl(arvcr1, ARVCR1);
321 disable_dma();
322 ar_outl(0x8000, M32R_DMAEDET_PORTL);
323 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
324 ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
325 ar_outl(ARDATA32, M32R_DMA0CSA_PORTL);
326 ar_outl(ARDATA32, M32R_DMA0RSA_PORTL);
327 ar_outl(ar->line_bytes, M32R_DMA0CBCUT_PORTL);
328 ar_outl(ar->line_bytes, M32R_DMA0RBCUT_PORTL);
329
330 local_irq_save(flags);
331 while (ar_inl(ARVHCOUNT) != 0) /* wait for 0 */
332 cpu_relax();
333 if (ar->mode == AR_MODE_INTERLACE && ar->size == AR_SIZE_VGA) {
334 for (h = 0; h < ar->height; h++) {
335 wait_for_vertical_sync(h);
336 if (h < (AR_HEIGHT_VGA/2))
337 l = h << 1;
338 else
339 l = (((h - (AR_HEIGHT_VGA/2)) << 1) + 1);
340 ar_outl(virt_to_phys(ar->frame[l]), M32R_DMA0CDA_PORTL);
341 enable_dma();
342 while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
343 cpu_relax();
344 disable_dma();
345 clear_dma_status();
346 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
347 }
348 } else {
349 for (h = 0; h < ar->height; h++) {
350 wait_for_vertical_sync(h);
351 ar_outl(virt_to_phys(ar->frame[h]), M32R_DMA0CDA_PORTL);
352 enable_dma();
353 while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
354 cpu_relax();
355 disable_dma();
356 clear_dma_status();
357 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
358 }
359 }
360 local_irq_restore(flags);
361 #endif /* ! USE_INT */
362
363 /*
364 * convert YUV422 to YUV422P
365 * +--------------------+
366 * | Y0,Y1,... |
367 * | ..............Yn |
368 * +--------------------+
369 * | U0,U1,........Un |
370 * +--------------------+
371 * | V0,V1,........Vn |
372 * +--------------------+
373 */
374 py = yuv;
375 pu = py + (ar->frame_bytes / 2);
376 pv = pu + (ar->frame_bytes / 4);
377 for (h = 0; h < ar->height; h++) {
378 p = ar->frame[h];
379 for (w = 0; w < ar->line_bytes; w += 4) {
380 *py++ = *p++;
381 *pu++ = *p++;
382 *py++ = *p++;
383 *pv++ = *p++;
384 }
385 }
386 if (copy_to_user(buf, yuv, ar->frame_bytes)) {
387 printk("arv: failed while copy_to_user yuv.\n");
388 ret = -EFAULT;
389 goto out_up;
390 }
391 DEBUG(1, "ret = %d\n", ret);
392 out_up:
393 mutex_unlock(&ar->lock);
394 return ret;
395 }
396
397 static int ar_do_ioctl(struct inode *inode, struct file *file,
398 unsigned int cmd, void *arg)
399 {
400 struct video_device *dev = video_devdata(file);
401 struct ar_device *ar = dev->priv;
402
403 DEBUG(1, "ar_ioctl()\n");
404 switch(cmd) {
405 case VIDIOCGCAP:
406 {
407 struct video_capability *b = arg;
408 DEBUG(1, "VIDIOCGCAP:\n");
409 strcpy(b->name, ar->vdev->name);
410 b->type = VID_TYPE_CAPTURE;
411 b->channels = 0;
412 b->audios = 0;
413 b->maxwidth = MAX_AR_WIDTH;
414 b->maxheight = MAX_AR_HEIGHT;
415 b->minwidth = MIN_AR_WIDTH;
416 b->minheight = MIN_AR_HEIGHT;
417 return 0;
418 }
419 case VIDIOCGCHAN:
420 DEBUG(1, "VIDIOCGCHAN:\n");
421 return 0;
422 case VIDIOCSCHAN:
423 DEBUG(1, "VIDIOCSCHAN:\n");
424 return 0;
425 case VIDIOCGTUNER:
426 DEBUG(1, "VIDIOCGTUNER:\n");
427 return 0;
428 case VIDIOCSTUNER:
429 DEBUG(1, "VIDIOCSTUNER:\n");
430 return 0;
431 case VIDIOCGPICT:
432 DEBUG(1, "VIDIOCGPICT:\n");
433 return 0;
434 case VIDIOCSPICT:
435 DEBUG(1, "VIDIOCSPICT:\n");
436 return 0;
437 case VIDIOCCAPTURE:
438 DEBUG(1, "VIDIOCCAPTURE:\n");
439 return -EINVAL;
440 case VIDIOCGWIN:
441 {
442 struct video_window *w = arg;
443 DEBUG(1, "VIDIOCGWIN:\n");
444 memset(w, 0, sizeof(*w));
445 w->width = ar->width;
446 w->height = ar->height;
447 return 0;
448 }
449 case VIDIOCSWIN:
450 {
451 struct video_window *w = arg;
452 DEBUG(1, "VIDIOCSWIN:\n");
453 if ((w->width != AR_WIDTH_VGA || w->height != AR_HEIGHT_VGA) &&
454 (w->width != AR_WIDTH_QVGA || w->height != AR_HEIGHT_QVGA))
455 return -EINVAL;
456
457 mutex_lock(&ar->lock);
458 ar->width = w->width;
459 ar->height = w->height;
460 if (ar->width == AR_WIDTH_VGA) {
461 ar->size = AR_SIZE_VGA;
462 ar->frame_bytes = AR_FRAME_BYTES_VGA;
463 ar->line_bytes = AR_LINE_BYTES_VGA;
464 if (vga_interlace)
465 ar->mode = AR_MODE_INTERLACE;
466 else
467 ar->mode = AR_MODE_NORMAL;
468 } else {
469 ar->size = AR_SIZE_QVGA;
470 ar->frame_bytes = AR_FRAME_BYTES_QVGA;
471 ar->line_bytes = AR_LINE_BYTES_QVGA;
472 ar->mode = AR_MODE_INTERLACE;
473 }
474 mutex_unlock(&ar->lock);
475 return 0;
476 }
477 case VIDIOCGFBUF:
478 DEBUG(1, "VIDIOCGFBUF:\n");
479 return -EINVAL;
480 case VIDIOCSFBUF:
481 DEBUG(1, "VIDIOCSFBUF:\n");
482 return -EINVAL;
483 case VIDIOCKEY:
484 DEBUG(1, "VIDIOCKEY:\n");
485 return 0;
486 case VIDIOCGFREQ:
487 DEBUG(1, "VIDIOCGFREQ:\n");
488 return -EINVAL;
489 case VIDIOCSFREQ:
490 DEBUG(1, "VIDIOCSFREQ:\n");
491 return -EINVAL;
492 case VIDIOCGAUDIO:
493 DEBUG(1, "VIDIOCGAUDIO:\n");
494 return -EINVAL;
495 case VIDIOCSAUDIO:
496 DEBUG(1, "VIDIOCSAUDIO:\n");
497 return -EINVAL;
498 case VIDIOCSYNC:
499 DEBUG(1, "VIDIOCSYNC:\n");
500 return -EINVAL;
501 case VIDIOCMCAPTURE:
502 DEBUG(1, "VIDIOCMCAPTURE:\n");
503 return -EINVAL;
504 case VIDIOCGMBUF:
505 DEBUG(1, "VIDIOCGMBUF:\n");
506 return -EINVAL;
507 case VIDIOCGUNIT:
508 DEBUG(1, "VIDIOCGUNIT:\n");
509 return -EINVAL;
510 case VIDIOCGCAPTURE:
511 DEBUG(1, "VIDIOCGCAPTURE:\n");
512 return -EINVAL;
513 case VIDIOCSCAPTURE:
514 DEBUG(1, "VIDIOCSCAPTURE:\n");
515 return -EINVAL;
516 case VIDIOCSPLAYMODE:
517 DEBUG(1, "VIDIOCSPLAYMODE:\n");
518 return -EINVAL;
519 case VIDIOCSWRITEMODE:
520 DEBUG(1, "VIDIOCSWRITEMODE:\n");
521 return -EINVAL;
522 case VIDIOCGPLAYINFO:
523 DEBUG(1, "VIDIOCGPLAYINFO:\n");
524 return -EINVAL;
525 case VIDIOCSMICROCODE:
526 DEBUG(1, "VIDIOCSMICROCODE:\n");
527 return -EINVAL;
528 case VIDIOCGVBIFMT:
529 DEBUG(1, "VIDIOCGVBIFMT:\n");
530 return -EINVAL;
531 case VIDIOCSVBIFMT:
532 DEBUG(1, "VIDIOCSVBIFMT:\n");
533 return -EINVAL;
534 default:
535 DEBUG(1, "Unknown ioctl(0x%08x)\n", cmd);
536 return -ENOIOCTLCMD;
537 }
538 return 0;
539 }
540
541 static int ar_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
542 unsigned long arg)
543 {
544 return video_usercopy(inode, file, cmd, arg, ar_do_ioctl);
545 }
546
547 #if USE_INT
548 /*
549 * Interrupt handler
550 */
551 static void ar_interrupt(int irq, void *dev)
552 {
553 struct ar_device *ar = dev;
554 unsigned int line_count;
555 unsigned int line_number;
556 unsigned int arvcr1;
557
558 line_count = ar_inl(ARVHCOUNT); /* line number */
559 if (ar->mode == AR_MODE_INTERLACE && ar->size == AR_SIZE_VGA) {
560 /* operations for interlace mode */
561 if ( line_count < (AR_HEIGHT_VGA/2) ) /* even line */
562 line_number = (line_count << 1);
563 else /* odd line */
564 line_number =
565 (((line_count - (AR_HEIGHT_VGA/2)) << 1) + 1);
566 } else {
567 line_number = line_count;
568 }
569
570 if (line_number == 0) {
571 /*
572 * It is an interrupt for line 0.
573 * we have to start capture.
574 */
575 disable_dma();
576 #if 0
577 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* needless? */
578 #endif
579 memcpy(ar->frame[0], ar->line_buff, ar->line_bytes);
580 #if 0
581 ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
582 #endif
583 enable_dma();
584 ar->start_capture = 1; /* during capture */
585 return;
586 }
587
588 if (ar->start_capture == 1 && line_number <= (ar->height - 1)) {
589 disable_dma();
590 memcpy(ar->frame[line_number], ar->line_buff, ar->line_bytes);
591
592 /*
593 * if captured all line of a frame, disable AR interrupt
594 * and wake a process up.
595 */
596 if (line_number == (ar->height - 1)) { /* end of line */
597
598 ar->start_capture = 0;
599
600 /* disable AR interrupt request */
601 arvcr1 = ar_inl(ARVCR1);
602 arvcr1 &= ~ARVCR1_HIEN; /* clear int. flag */
603 ar_outl(arvcr1, ARVCR1); /* disable */
604 wake_up_interruptible(&ar->wait);
605 } else {
606 #if 0
607 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL);
608 ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
609 #endif
610 enable_dma();
611 }
612 }
613 }
614 #endif
615
616 /*
617 * ar_initialize()
618 * ar_initialize() is called by video_register_device() and
619 * initializes AR LSI and peripherals.
620 *
621 * -1 is returned in all failures.
622 * 0 is returned in success.
623 *
624 */
625 static int ar_initialize(struct video_device *dev)
626 {
627 struct ar_device *ar = dev->priv;
628 unsigned long cr = 0;
629 int i,found=0;
630
631 DEBUG(1, "ar_initialize:\n");
632
633 /*
634 * initialize AR LSI
635 */
636 ar_outl(0, ARVCR0); /* assert reset of AR LSI */
637 for (i = 0; i < 0x18; i++) /* wait for over 10 cycles @ 27MHz */
638 cpu_relax();
639 ar_outl(ARVCR0_RST, ARVCR0); /* negate reset of AR LSI (enable) */
640 for (i = 0; i < 0x40d; i++) /* wait for over 420 cycles @ 27MHz */
641 cpu_relax();
642
643 /* AR uses INT3 of CPU as interrupt pin. */
644 ar_outl(ARINTSEL_INT3, ARINTSEL);
645
646 if (ar->size == AR_SIZE_QVGA)
647 cr |= ARVCR1_QVGA;
648 if (ar->mode == AR_MODE_NORMAL)
649 cr |= ARVCR1_NORMAL;
650 ar_outl(cr, ARVCR1);
651
652 /*
653 * Initialize IIC so that CPU can communicate with AR LSI,
654 * and send boot commands to AR LSI.
655 */
656 init_iic();
657
658 for (i = 0; i < 0x100000; i++) { /* > 0xa1d10, 56ms */
659 if ((ar_inl(ARVCR0) & ARVCR0_VDS)) { /* VSYNC */
660 found = 1;
661 break;
662 }
663 }
664
665 if (found == 0)
666 return -ENODEV;
667
668 printk("arv: Initializing ");
669
670 iic(2,0x78,0x11,0x01,0x00); /* start */
671 iic(3,0x78,0x12,0x00,0x06);
672 iic(3,0x78,0x12,0x12,0x30);
673 iic(3,0x78,0x12,0x15,0x58);
674 iic(3,0x78,0x12,0x17,0x30);
675 printk(".");
676 iic(3,0x78,0x12,0x1a,0x97);
677 iic(3,0x78,0x12,0x1b,0xff);
678 iic(3,0x78,0x12,0x1c,0xff);
679 iic(3,0x78,0x12,0x26,0x10);
680 iic(3,0x78,0x12,0x27,0x00);
681 printk(".");
682 iic(2,0x78,0x34,0x02,0x00);
683 iic(2,0x78,0x7a,0x10,0x00);
684 iic(2,0x78,0x80,0x39,0x00);
685 iic(2,0x78,0x81,0xe6,0x00);
686 iic(2,0x78,0x8d,0x00,0x00);
687 printk(".");
688 iic(2,0x78,0x8e,0x0c,0x00);
689 iic(2,0x78,0x8f,0x00,0x00);
690 #if 0
691 iic(2,0x78,0x90,0x00,0x00); /* AWB on=1 off=0 */
692 #endif
693 iic(2,0x78,0x93,0x01,0x00);
694 iic(2,0x78,0x94,0xcd,0x00);
695 iic(2,0x78,0x95,0x00,0x00);
696 printk(".");
697 iic(2,0x78,0x96,0xa0,0x00);
698 iic(2,0x78,0x97,0x00,0x00);
699 iic(2,0x78,0x98,0x60,0x00);
700 iic(2,0x78,0x99,0x01,0x00);
701 iic(2,0x78,0x9a,0x19,0x00);
702 printk(".");
703 iic(2,0x78,0x9b,0x02,0x00);
704 iic(2,0x78,0x9c,0xe8,0x00);
705 iic(2,0x78,0x9d,0x02,0x00);
706 iic(2,0x78,0x9e,0x2e,0x00);
707 iic(2,0x78,0xb8,0x78,0x00);
708 iic(2,0x78,0xba,0x05,0x00);
709 #if 0
710 iic(2,0x78,0x83,0x8c,0x00); /* brightness */
711 #endif
712 printk(".");
713
714 /* color correction */
715 iic(3,0x78,0x49,0x00,0x95); /* a */
716 iic(3,0x78,0x49,0x01,0x96); /* b */
717 iic(3,0x78,0x49,0x03,0x85); /* c */
718 iic(3,0x78,0x49,0x04,0x97); /* d */
719 iic(3,0x78,0x49,0x02,0x7e); /* e(Lo) */
720 iic(3,0x78,0x49,0x05,0xa4); /* f(Lo) */
721 iic(3,0x78,0x49,0x06,0x04); /* e(Hi) */
722 iic(3,0x78,0x49,0x07,0x04); /* e(Hi) */
723 iic(2,0x78,0x48,0x01,0x00); /* on=1 off=0 */
724
725 printk(".");
726 iic(2,0x78,0x11,0x00,0x00); /* end */
727 printk(" done\n");
728 return 0;
729 }
730
731
732 void ar_release(struct video_device *vfd)
733 {
734 struct ar_device *ar = vfd->priv;
735 mutex_lock(&ar->lock);
736 video_device_release(vfd);
737 }
738
739 /****************************************************************************
740 *
741 * Video4Linux Module functions
742 *
743 ****************************************************************************/
744 static const struct file_operations ar_fops = {
745 .owner = THIS_MODULE,
746 .open = video_exclusive_open,
747 .release = video_exclusive_release,
748 .read = ar_read,
749 .ioctl = ar_ioctl,
750 .compat_ioctl = v4l_compat_ioctl32,
751 .llseek = no_llseek,
752 };
753
754 static struct video_device ar_template = {
755 .owner = THIS_MODULE,
756 .name = "Colour AR VGA",
757 .type = VID_TYPE_CAPTURE,
758 .fops = &ar_fops,
759 .release = ar_release,
760 .minor = -1,
761 };
762
763 #define ALIGN4(x) ((((int)(x)) & 0x3) == 0)
764 static struct ar_device ardev;
765
766 static int __init ar_init(void)
767 {
768 struct ar_device *ar;
769 int ret;
770 int i;
771
772 DEBUG(1, "ar_init:\n");
773 ret = -EIO;
774 printk(KERN_INFO "arv: Colour AR VGA driver %s\n", VERSION);
775
776 ar = &ardev;
777 memset(ar, 0, sizeof(struct ar_device));
778
779 #if USE_INT
780 /* allocate a DMA buffer for 1 line. */
781 ar->line_buff = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL | GFP_DMA);
782 if (ar->line_buff == NULL || ! ALIGN4(ar->line_buff)) {
783 printk("arv: buffer allocation failed for DMA.\n");
784 ret = -ENOMEM;
785 goto out_end;
786 }
787 #endif
788 /* allocate buffers for a frame */
789 for (i = 0; i < MAX_AR_HEIGHT; i++) {
790 ar->frame[i] = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL);
791 if (ar->frame[i] == NULL || ! ALIGN4(ar->frame[i])) {
792 printk("arv: buffer allocation failed for frame.\n");
793 ret = -ENOMEM;
794 goto out_line_buff;
795 }
796 }
797
798 ar->vdev = video_device_alloc();
799 if (!ar->vdev) {
800 printk(KERN_ERR "arv: video_device_alloc() failed\n");
801 return -ENOMEM;
802 }
803 memcpy(ar->vdev, &ar_template, sizeof(ar_template));
804 ar->vdev->priv = ar;
805
806 if (vga) {
807 ar->width = AR_WIDTH_VGA;
808 ar->height = AR_HEIGHT_VGA;
809 ar->size = AR_SIZE_VGA;
810 ar->frame_bytes = AR_FRAME_BYTES_VGA;
811 ar->line_bytes = AR_LINE_BYTES_VGA;
812 if (vga_interlace)
813 ar->mode = AR_MODE_INTERLACE;
814 else
815 ar->mode = AR_MODE_NORMAL;
816 } else {
817 ar->width = AR_WIDTH_QVGA;
818 ar->height = AR_HEIGHT_QVGA;
819 ar->size = AR_SIZE_QVGA;
820 ar->frame_bytes = AR_FRAME_BYTES_QVGA;
821 ar->line_bytes = AR_LINE_BYTES_QVGA;
822 ar->mode = AR_MODE_INTERLACE;
823 }
824 mutex_init(&ar->lock);
825 init_waitqueue_head(&ar->wait);
826
827 #if USE_INT
828 if (request_irq(M32R_IRQ_INT3, ar_interrupt, 0, "arv", ar)) {
829 printk("arv: request_irq(%d) failed.\n", M32R_IRQ_INT3);
830 ret = -EIO;
831 goto out_irq;
832 }
833 #endif
834
835 if (ar_initialize(ar->vdev) != 0) {
836 printk("arv: M64278 not found.\n");
837 ret = -ENODEV;
838 goto out_dev;
839 }
840
841 /*
842 * ok, we can initialize h/w according to parameters,
843 * so register video device as a frame grabber type.
844 * device is named "video[0-64]".
845 * video_register_device() initializes h/w using ar_initialize().
846 */
847 if (video_register_device(ar->vdev, VFL_TYPE_GRABBER, video_nr) != 0) {
848 /* return -1, -ENFILE(full) or others */
849 printk("arv: register video (Colour AR) failed.\n");
850 ret = -ENODEV;
851 goto out_dev;
852 }
853
854 printk("video%d: Found M64278 VGA (IRQ %d, Freq %dMHz).\n",
855 ar->vdev->minor, M32R_IRQ_INT3, freq);
856
857 return 0;
858
859 out_dev:
860 #if USE_INT
861 free_irq(M32R_IRQ_INT3, ar);
862
863 out_irq:
864 #endif
865 for (i = 0; i < MAX_AR_HEIGHT; i++)
866 kfree(ar->frame[i]);
867
868 out_line_buff:
869 #if USE_INT
870 kfree(ar->line_buff);
871
872 out_end:
873 #endif
874 return ret;
875 }
876
877
878 static int __init ar_init_module(void)
879 {
880 freq = (boot_cpu_data.bus_clock / 1000000);
881 printk("arv: Bus clock %d\n", freq);
882 if (freq != 50 && freq != 75)
883 freq = DEFAULT_FREQ;
884 return ar_init();
885 }
886
887 static void __exit ar_cleanup_module(void)
888 {
889 struct ar_device *ar;
890 int i;
891
892 ar = &ardev;
893 video_unregister_device(ar->vdev);
894 #if USE_INT
895 free_irq(M32R_IRQ_INT3, ar);
896 #endif
897 for (i = 0; i < MAX_AR_HEIGHT; i++)
898 kfree(ar->frame[i]);
899 #if USE_INT
900 kfree(ar->line_buff);
901 #endif
902 }
903
904 module_init(ar_init_module);
905 module_exit(ar_cleanup_module);
906
907 MODULE_AUTHOR("Takeo Takahashi <takahashi.takeo@renesas.com>");
908 MODULE_DESCRIPTION("Colour AR M64278(VGA) for Video4Linux");
909 MODULE_LICENSE("GPL");
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