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 <media/v4l2-ioctl.h>
33 #include <linux/mutex.h>
34
35 #include <asm/uaccess.h>
36 #include <asm/m32r.h>
37 #include <asm/io.h>
38 #include <asm/dma.h>
39 #include <asm/byteorder.h>
40
41 #if 0
42 #define DEBUG(n, args...) printk(args)
43 #define CHECK_LOST 1
44 #else
45 #define DEBUG(n, args...)
46 #define CHECK_LOST 0
47 #endif
48
49 /*
50 * USE_INT is always 0, interrupt mode is not available
51 * on linux due to lack of speed
52 */
53 #define USE_INT 0 /* Don't modify */
54
55 #define VERSION "0.03"
56
57 #define ar_inl(addr) inl((unsigned long)(addr))
58 #define ar_outl(val, addr) outl((unsigned long)(val),(unsigned long)(addr))
59
60 extern struct cpuinfo_m32r boot_cpu_data;
61
62 /*
63 * CCD pixel size
64 * Note that M32700UT does not support CIF mode, but QVGA is
65 * supported by M32700UT hardware using VGA mode of AR LSI.
66 *
67 * Supported: VGA (Normal mode, Interlace mode)
68 * QVGA (Always Interlace mode of VGA)
69 *
70 */
71 #define AR_WIDTH_VGA 640
72 #define AR_HEIGHT_VGA 480
73 #define AR_WIDTH_QVGA 320
74 #define AR_HEIGHT_QVGA 240
75 #define MIN_AR_WIDTH AR_WIDTH_QVGA
76 #define MIN_AR_HEIGHT AR_HEIGHT_QVGA
77 #define MAX_AR_WIDTH AR_WIDTH_VGA
78 #define MAX_AR_HEIGHT AR_HEIGHT_VGA
79
80 /* bits & bytes per pixel */
81 #define AR_BITS_PER_PIXEL 16
82 #define AR_BYTES_PER_PIXEL (AR_BITS_PER_PIXEL/8)
83
84 /* line buffer size */
85 #define AR_LINE_BYTES_VGA (AR_WIDTH_VGA * AR_BYTES_PER_PIXEL)
86 #define AR_LINE_BYTES_QVGA (AR_WIDTH_QVGA * AR_BYTES_PER_PIXEL)
87 #define MAX_AR_LINE_BYTES AR_LINE_BYTES_VGA
88
89 /* frame size & type */
90 #define AR_FRAME_BYTES_VGA \
91 (AR_WIDTH_VGA * AR_HEIGHT_VGA * AR_BYTES_PER_PIXEL)
92 #define AR_FRAME_BYTES_QVGA \
93 (AR_WIDTH_QVGA * AR_HEIGHT_QVGA * AR_BYTES_PER_PIXEL)
94 #define MAX_AR_FRAME_BYTES \
95 (MAX_AR_WIDTH * MAX_AR_HEIGHT * AR_BYTES_PER_PIXEL)
96
97 #define AR_MAX_FRAME 15
98
99 /* capture size */
100 #define AR_SIZE_VGA 0
101 #define AR_SIZE_QVGA 1
102
103 /* capture mode */
104 #define AR_MODE_INTERLACE 0
105 #define AR_MODE_NORMAL 1
106
107 struct ar_device {
108 struct video_device *vdev;
109 unsigned int start_capture; /* duaring capture in INT. mode. */
110 #if USE_INT
111 unsigned char *line_buff; /* DMA line buffer */
112 #endif
113 unsigned char *frame[MAX_AR_HEIGHT]; /* frame data */
114 short size; /* capture size */
115 short mode; /* capture mode */
116 int width, height;
117 int frame_bytes, line_bytes;
118 wait_queue_head_t wait;
119 unsigned long in_use;
120 struct mutex lock;
121 };
122
123 static int video_nr = -1; /* video device number (first free) */
124 static unsigned char yuv[MAX_AR_FRAME_BYTES];
125
126 /* module parameters */
127 /* default frequency */
128 #define DEFAULT_FREQ 50 /* 50 or 75 (MHz) is available as BCLK */
129 static int freq = DEFAULT_FREQ; /* BCLK: available 50 or 70 (MHz) */
130 static int vga; /* default mode(0:QVGA mode, other:VGA mode) */
131 static int vga_interlace; /* 0 is normal mode for, else interlace mode */
132 module_param(freq, int, 0);
133 module_param(vga, int, 0);
134 module_param(vga_interlace, int, 0);
135
136 static int ar_initialize(struct video_device *dev);
137
wait_for_vsync(void)138 static inline void wait_for_vsync(void)
139 {
140 while (ar_inl(ARVCR0) & ARVCR0_VDS) /* wait for VSYNC */
141 cpu_relax();
142 while (!(ar_inl(ARVCR0) & ARVCR0_VDS)) /* wait for VSYNC */
143 cpu_relax();
144 }
145
wait_acknowledge(void)146 static inline void wait_acknowledge(void)
147 {
148 int i;
149
150 for (i = 0; i < 1000; i++)
151 cpu_relax();
152 while (ar_inl(PLDI2CSTS) & PLDI2CSTS_NOACK)
153 cpu_relax();
154 }
155
156 /*******************************************************************
157 * I2C functions
158 *******************************************************************/
iic(int n,unsigned long addr,unsigned long data1,unsigned long data2,unsigned long data3)159 void iic(int n, unsigned long addr, unsigned long data1, unsigned long data2,
160 unsigned long data3)
161 {
162 int i;
163
164 /* Slave Address */
165 ar_outl(addr, PLDI2CDATA);
166 wait_for_vsync();
167
168 /* Start */
169 ar_outl(1, PLDI2CCND);
170 wait_acknowledge();
171
172 /* Transfer data 1 */
173 ar_outl(data1, PLDI2CDATA);
174 wait_for_vsync();
175 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
176 wait_acknowledge();
177
178 /* Transfer data 2 */
179 ar_outl(data2, PLDI2CDATA);
180 wait_for_vsync();
181 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
182 wait_acknowledge();
183
184 if (n == 3) {
185 /* Transfer data 3 */
186 ar_outl(data3, PLDI2CDATA);
187 wait_for_vsync();
188 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
189 wait_acknowledge();
190 }
191
192 /* Stop */
193 for (i = 0; i < 100; i++)
194 cpu_relax();
195 ar_outl(2, PLDI2CCND);
196 ar_outl(2, PLDI2CCND);
197
198 while (ar_inl(PLDI2CSTS) & PLDI2CSTS_BB)
199 cpu_relax();
200 }
201
202
init_iic(void)203 void init_iic(void)
204 {
205 DEBUG(1, "init_iic:\n");
206
207 /*
208 * ICU Setting (iic)
209 */
210 /* I2C Setting */
211 ar_outl(0x0, PLDI2CCR); /* I2CCR Disable */
212 ar_outl(0x0300, PLDI2CMOD); /* I2CMOD ACK/8b-data/7b-addr/auto */
213 ar_outl(0x1, PLDI2CACK); /* I2CACK ACK */
214
215 /* I2C CLK */
216 /* 50MH-100k */
217 if (freq == 75) {
218 ar_outl(369, PLDI2CFREQ); /* BCLK = 75MHz */
219 } else if (freq == 50) {
220 ar_outl(244, PLDI2CFREQ); /* BCLK = 50MHz */
221 } else {
222 ar_outl(244, PLDI2CFREQ); /* default: BCLK = 50MHz */
223 }
224 ar_outl(0x1, PLDI2CCR); /* I2CCR Enable */
225 }
226
227 /**************************************************************************
228 *
229 * Video4Linux Interface functions
230 *
231 **************************************************************************/
232
disable_dma(void)233 static inline void disable_dma(void)
234 {
235 ar_outl(0x8000, M32R_DMAEN_PORTL); /* disable DMA0 */
236 }
237
enable_dma(void)238 static inline void enable_dma(void)
239 {
240 ar_outl(0x8080, M32R_DMAEN_PORTL); /* enable DMA0 */
241 }
242
clear_dma_status(void)243 static inline void clear_dma_status(void)
244 {
245 ar_outl(0x8000, M32R_DMAEDET_PORTL); /* clear status */
246 }
247
wait_for_vertical_sync(int exp_line)248 static inline void wait_for_vertical_sync(int exp_line)
249 {
250 #if CHECK_LOST
251 int tmout = 10000; /* FIXME */
252 int l;
253
254 /*
255 * check HCOUNT because we cannot check vertical sync.
256 */
257 for (; tmout >= 0; tmout--) {
258 l = ar_inl(ARVHCOUNT);
259 if (l == exp_line)
260 break;
261 }
262 if (tmout < 0)
263 printk("arv: lost %d -> %d\n", exp_line, l);
264 #else
265 while (ar_inl(ARVHCOUNT) != exp_line)
266 cpu_relax();
267 #endif
268 }
269
ar_read(struct file * file,char * buf,size_t count,loff_t * ppos)270 static ssize_t ar_read(struct file *file, char *buf, size_t count, loff_t *ppos)
271 {
272 struct video_device *v = video_devdata(file);
273 struct ar_device *ar = video_get_drvdata(v);
274 long ret = ar->frame_bytes; /* return read bytes */
275 unsigned long arvcr1 = 0;
276 unsigned long flags;
277 unsigned char *p;
278 int h, w;
279 unsigned char *py, *pu, *pv;
280 #if ! USE_INT
281 int l;
282 #endif
283
284 DEBUG(1, "ar_read()\n");
285
286 if (ar->size == AR_SIZE_QVGA)
287 arvcr1 |= ARVCR1_QVGA;
288 if (ar->mode == AR_MODE_NORMAL)
289 arvcr1 |= ARVCR1_NORMAL;
290
291 mutex_lock(&ar->lock);
292
293 #if USE_INT
294 local_irq_save(flags);
295 disable_dma();
296 ar_outl(0xa1871300, M32R_DMA0CR0_PORTL);
297 ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
298
299 /* set AR FIFO address as source(BSEL5) */
300 ar_outl(ARDATA32, M32R_DMA0CSA_PORTL);
301 ar_outl(ARDATA32, M32R_DMA0RSA_PORTL);
302 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* destination addr. */
303 ar_outl(ar->line_buff, M32R_DMA0RDA_PORTL); /* reload address */
304 ar_outl(ar->line_bytes, M32R_DMA0CBCUT_PORTL); /* byte count (bytes) */
305 ar_outl(ar->line_bytes, M32R_DMA0RBCUT_PORTL); /* reload count (bytes) */
306
307 /*
308 * Okey , kicks AR LSI to invoke an interrupt
309 */
310 ar->start_capture = 0;
311 ar_outl(arvcr1 | ARVCR1_HIEN, ARVCR1);
312 local_irq_restore(flags);
313 /* .... AR interrupts .... */
314 interruptible_sleep_on(&ar->wait);
315 if (signal_pending(current)) {
316 printk("arv: interrupted while get frame data.\n");
317 ret = -EINTR;
318 goto out_up;
319 }
320 #else /* ! USE_INT */
321 /* polling */
322 ar_outl(arvcr1, ARVCR1);
323 disable_dma();
324 ar_outl(0x8000, M32R_DMAEDET_PORTL);
325 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
326 ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
327 ar_outl(ARDATA32, M32R_DMA0CSA_PORTL);
328 ar_outl(ARDATA32, M32R_DMA0RSA_PORTL);
329 ar_outl(ar->line_bytes, M32R_DMA0CBCUT_PORTL);
330 ar_outl(ar->line_bytes, M32R_DMA0RBCUT_PORTL);
331
332 local_irq_save(flags);
333 while (ar_inl(ARVHCOUNT) != 0) /* wait for 0 */
334 cpu_relax();
335 if (ar->mode == AR_MODE_INTERLACE && ar->size == AR_SIZE_VGA) {
336 for (h = 0; h < ar->height; h++) {
337 wait_for_vertical_sync(h);
338 if (h < (AR_HEIGHT_VGA/2))
339 l = h << 1;
340 else
341 l = (((h - (AR_HEIGHT_VGA/2)) << 1) + 1);
342 ar_outl(virt_to_phys(ar->frame[l]), M32R_DMA0CDA_PORTL);
343 enable_dma();
344 while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
345 cpu_relax();
346 disable_dma();
347 clear_dma_status();
348 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
349 }
350 } else {
351 for (h = 0; h < ar->height; h++) {
352 wait_for_vertical_sync(h);
353 ar_outl(virt_to_phys(ar->frame[h]), M32R_DMA0CDA_PORTL);
354 enable_dma();
355 while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
356 cpu_relax();
357 disable_dma();
358 clear_dma_status();
359 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
360 }
361 }
362 local_irq_restore(flags);
363 #endif /* ! USE_INT */
364
365 /*
366 * convert YUV422 to YUV422P
367 * +--------------------+
368 * | Y0,Y1,... |
369 * | ..............Yn |
370 * +--------------------+
371 * | U0,U1,........Un |
372 * +--------------------+
373 * | V0,V1,........Vn |
374 * +--------------------+
375 */
376 py = yuv;
377 pu = py + (ar->frame_bytes / 2);
378 pv = pu + (ar->frame_bytes / 4);
379 for (h = 0; h < ar->height; h++) {
380 p = ar->frame[h];
381 for (w = 0; w < ar->line_bytes; w += 4) {
382 *py++ = *p++;
383 *pu++ = *p++;
384 *py++ = *p++;
385 *pv++ = *p++;
386 }
387 }
388 if (copy_to_user(buf, yuv, ar->frame_bytes)) {
389 printk("arv: failed while copy_to_user yuv.\n");
390 ret = -EFAULT;
391 goto out_up;
392 }
393 DEBUG(1, "ret = %d\n", ret);
394 out_up:
395 mutex_unlock(&ar->lock);
396 return ret;
397 }
398
ar_do_ioctl(struct file * file,unsigned int cmd,void * arg)399 static long ar_do_ioctl(struct file *file, unsigned int cmd, void *arg)
400 {
401 struct video_device *dev = video_devdata(file);
402 struct ar_device *ar = video_get_drvdata(dev);
403
404 DEBUG(1, "ar_ioctl()\n");
405 switch(cmd) {
406 case VIDIOCGCAP:
407 {
408 struct video_capability *b = arg;
409 DEBUG(1, "VIDIOCGCAP:\n");
410 strcpy(b->name, ar->vdev->name);
411 b->type = VID_TYPE_CAPTURE;
412 b->channels = 0;
413 b->audios = 0;
414 b->maxwidth = MAX_AR_WIDTH;
415 b->maxheight = MAX_AR_HEIGHT;
416 b->minwidth = MIN_AR_WIDTH;
417 b->minheight = MIN_AR_HEIGHT;
418 return 0;
419 }
420 case VIDIOCGCHAN:
421 DEBUG(1, "VIDIOCGCHAN:\n");
422 return 0;
423 case VIDIOCSCHAN:
424 DEBUG(1, "VIDIOCSCHAN:\n");
425 return 0;
426 case VIDIOCGTUNER:
427 DEBUG(1, "VIDIOCGTUNER:\n");
428 return 0;
429 case VIDIOCSTUNER:
430 DEBUG(1, "VIDIOCSTUNER:\n");
431 return 0;
432 case VIDIOCGPICT:
433 DEBUG(1, "VIDIOCGPICT:\n");
434 return 0;
435 case VIDIOCSPICT:
436 DEBUG(1, "VIDIOCSPICT:\n");
437 return 0;
438 case VIDIOCCAPTURE:
439 DEBUG(1, "VIDIOCCAPTURE:\n");
440 return -EINVAL;
441 case VIDIOCGWIN:
442 {
443 struct video_window *w = arg;
444 DEBUG(1, "VIDIOCGWIN:\n");
445 memset(w, 0, sizeof(*w));
446 w->width = ar->width;
447 w->height = ar->height;
448 return 0;
449 }
450 case VIDIOCSWIN:
451 {
452 struct video_window *w = arg;
453 DEBUG(1, "VIDIOCSWIN:\n");
454 if ((w->width != AR_WIDTH_VGA || w->height != AR_HEIGHT_VGA) &&
455 (w->width != AR_WIDTH_QVGA || w->height != AR_HEIGHT_QVGA))
456 return -EINVAL;
457
458 mutex_lock(&ar->lock);
459 ar->width = w->width;
460 ar->height = w->height;
461 if (ar->width == AR_WIDTH_VGA) {
462 ar->size = AR_SIZE_VGA;
463 ar->frame_bytes = AR_FRAME_BYTES_VGA;
464 ar->line_bytes = AR_LINE_BYTES_VGA;
465 if (vga_interlace)
466 ar->mode = AR_MODE_INTERLACE;
467 else
468 ar->mode = AR_MODE_NORMAL;
469 } else {
470 ar->size = AR_SIZE_QVGA;
471 ar->frame_bytes = AR_FRAME_BYTES_QVGA;
472 ar->line_bytes = AR_LINE_BYTES_QVGA;
473 ar->mode = AR_MODE_INTERLACE;
474 }
475 mutex_unlock(&ar->lock);
476 return 0;
477 }
478 case VIDIOCGFBUF:
479 DEBUG(1, "VIDIOCGFBUF:\n");
480 return -EINVAL;
481 case VIDIOCSFBUF:
482 DEBUG(1, "VIDIOCSFBUF:\n");
483 return -EINVAL;
484 case VIDIOCKEY:
485 DEBUG(1, "VIDIOCKEY:\n");
486 return 0;
487 case VIDIOCGFREQ:
488 DEBUG(1, "VIDIOCGFREQ:\n");
489 return -EINVAL;
490 case VIDIOCSFREQ:
491 DEBUG(1, "VIDIOCSFREQ:\n");
492 return -EINVAL;
493 case VIDIOCGAUDIO:
494 DEBUG(1, "VIDIOCGAUDIO:\n");
495 return -EINVAL;
496 case VIDIOCSAUDIO:
497 DEBUG(1, "VIDIOCSAUDIO:\n");
498 return -EINVAL;
499 case VIDIOCSYNC:
500 DEBUG(1, "VIDIOCSYNC:\n");
501 return -EINVAL;
502 case VIDIOCMCAPTURE:
503 DEBUG(1, "VIDIOCMCAPTURE:\n");
504 return -EINVAL;
505 case VIDIOCGMBUF:
506 DEBUG(1, "VIDIOCGMBUF:\n");
507 return -EINVAL;
508 case VIDIOCGUNIT:
509 DEBUG(1, "VIDIOCGUNIT:\n");
510 return -EINVAL;
511 case VIDIOCGCAPTURE:
512 DEBUG(1, "VIDIOCGCAPTURE:\n");
513 return -EINVAL;
514 case VIDIOCSCAPTURE:
515 DEBUG(1, "VIDIOCSCAPTURE:\n");
516 return -EINVAL;
517 case VIDIOCSPLAYMODE:
518 DEBUG(1, "VIDIOCSPLAYMODE:\n");
519 return -EINVAL;
520 case VIDIOCSWRITEMODE:
521 DEBUG(1, "VIDIOCSWRITEMODE:\n");
522 return -EINVAL;
523 case VIDIOCGPLAYINFO:
524 DEBUG(1, "VIDIOCGPLAYINFO:\n");
525 return -EINVAL;
526 case VIDIOCSMICROCODE:
527 DEBUG(1, "VIDIOCSMICROCODE:\n");
528 return -EINVAL;
529 case VIDIOCGVBIFMT:
530 DEBUG(1, "VIDIOCGVBIFMT:\n");
531 return -EINVAL;
532 case VIDIOCSVBIFMT:
533 DEBUG(1, "VIDIOCSVBIFMT:\n");
534 return -EINVAL;
535 default:
536 DEBUG(1, "Unknown ioctl(0x%08x)\n", cmd);
537 return -ENOIOCTLCMD;
538 }
539 return 0;
540 }
541
ar_ioctl(struct file * file,unsigned int cmd,unsigned long arg)542 static long ar_ioctl(struct file *file, unsigned int cmd,
543 unsigned long arg)
544 {
545 return video_usercopy(file, cmd, arg, ar_do_ioctl);
546 }
547
548 #if USE_INT
549 /*
550 * Interrupt handler
551 */
ar_interrupt(int irq,void * dev)552 static void ar_interrupt(int irq, void *dev)
553 {
554 struct ar_device *ar = dev;
555 unsigned int line_count;
556 unsigned int line_number;
557 unsigned int arvcr1;
558
559 line_count = ar_inl(ARVHCOUNT); /* line number */
560 if (ar->mode == AR_MODE_INTERLACE && ar->size == AR_SIZE_VGA) {
561 /* operations for interlace mode */
562 if ( line_count < (AR_HEIGHT_VGA/2) ) /* even line */
563 line_number = (line_count << 1);
564 else /* odd line */
565 line_number =
566 (((line_count - (AR_HEIGHT_VGA/2)) << 1) + 1);
567 } else {
568 line_number = line_count;
569 }
570
571 if (line_number == 0) {
572 /*
573 * It is an interrupt for line 0.
574 * we have to start capture.
575 */
576 disable_dma();
577 #if 0
578 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* needless? */
579 #endif
580 memcpy(ar->frame[0], ar->line_buff, ar->line_bytes);
581 #if 0
582 ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
583 #endif
584 enable_dma();
585 ar->start_capture = 1; /* during capture */
586 return;
587 }
588
589 if (ar->start_capture == 1 && line_number <= (ar->height - 1)) {
590 disable_dma();
591 memcpy(ar->frame[line_number], ar->line_buff, ar->line_bytes);
592
593 /*
594 * if captured all line of a frame, disable AR interrupt
595 * and wake a process up.
596 */
597 if (line_number == (ar->height - 1)) { /* end of line */
598
599 ar->start_capture = 0;
600
601 /* disable AR interrupt request */
602 arvcr1 = ar_inl(ARVCR1);
603 arvcr1 &= ~ARVCR1_HIEN; /* clear int. flag */
604 ar_outl(arvcr1, ARVCR1); /* disable */
605 wake_up_interruptible(&ar->wait);
606 } else {
607 #if 0
608 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL);
609 ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
610 #endif
611 enable_dma();
612 }
613 }
614 }
615 #endif
616
617 /*
618 * ar_initialize()
619 * ar_initialize() is called by video_register_device() and
620 * initializes AR LSI and peripherals.
621 *
622 * -1 is returned in all failures.
623 * 0 is returned in success.
624 *
625 */
ar_initialize(struct video_device * dev)626 static int ar_initialize(struct video_device *dev)
627 {
628 struct ar_device *ar = video_get_drvdata(dev);
629 unsigned long cr = 0;
630 int i,found=0;
631
632 DEBUG(1, "ar_initialize:\n");
633
634 /*
635 * initialize AR LSI
636 */
637 ar_outl(0, ARVCR0); /* assert reset of AR LSI */
638 for (i = 0; i < 0x18; i++) /* wait for over 10 cycles @ 27MHz */
639 cpu_relax();
640 ar_outl(ARVCR0_RST, ARVCR0); /* negate reset of AR LSI (enable) */
641 for (i = 0; i < 0x40d; i++) /* wait for over 420 cycles @ 27MHz */
642 cpu_relax();
643
644 /* AR uses INT3 of CPU as interrupt pin. */
645 ar_outl(ARINTSEL_INT3, ARINTSEL);
646
647 if (ar->size == AR_SIZE_QVGA)
648 cr |= ARVCR1_QVGA;
649 if (ar->mode == AR_MODE_NORMAL)
650 cr |= ARVCR1_NORMAL;
651 ar_outl(cr, ARVCR1);
652
653 /*
654 * Initialize IIC so that CPU can communicate with AR LSI,
655 * and send boot commands to AR LSI.
656 */
657 init_iic();
658
659 for (i = 0; i < 0x100000; i++) { /* > 0xa1d10, 56ms */
660 if ((ar_inl(ARVCR0) & ARVCR0_VDS)) { /* VSYNC */
661 found = 1;
662 break;
663 }
664 }
665
666 if (found == 0)
667 return -ENODEV;
668
669 printk("arv: Initializing ");
670
671 iic(2,0x78,0x11,0x01,0x00); /* start */
672 iic(3,0x78,0x12,0x00,0x06);
673 iic(3,0x78,0x12,0x12,0x30);
674 iic(3,0x78,0x12,0x15,0x58);
675 iic(3,0x78,0x12,0x17,0x30);
676 printk(".");
677 iic(3,0x78,0x12,0x1a,0x97);
678 iic(3,0x78,0x12,0x1b,0xff);
679 iic(3,0x78,0x12,0x1c,0xff);
680 iic(3,0x78,0x12,0x26,0x10);
681 iic(3,0x78,0x12,0x27,0x00);
682 printk(".");
683 iic(2,0x78,0x34,0x02,0x00);
684 iic(2,0x78,0x7a,0x10,0x00);
685 iic(2,0x78,0x80,0x39,0x00);
686 iic(2,0x78,0x81,0xe6,0x00);
687 iic(2,0x78,0x8d,0x00,0x00);
688 printk(".");
689 iic(2,0x78,0x8e,0x0c,0x00);
690 iic(2,0x78,0x8f,0x00,0x00);
691 #if 0
692 iic(2,0x78,0x90,0x00,0x00); /* AWB on=1 off=0 */
693 #endif
694 iic(2,0x78,0x93,0x01,0x00);
695 iic(2,0x78,0x94,0xcd,0x00);
696 iic(2,0x78,0x95,0x00,0x00);
697 printk(".");
698 iic(2,0x78,0x96,0xa0,0x00);
699 iic(2,0x78,0x97,0x00,0x00);
700 iic(2,0x78,0x98,0x60,0x00);
701 iic(2,0x78,0x99,0x01,0x00);
702 iic(2,0x78,0x9a,0x19,0x00);
703 printk(".");
704 iic(2,0x78,0x9b,0x02,0x00);
705 iic(2,0x78,0x9c,0xe8,0x00);
706 iic(2,0x78,0x9d,0x02,0x00);
707 iic(2,0x78,0x9e,0x2e,0x00);
708 iic(2,0x78,0xb8,0x78,0x00);
709 iic(2,0x78,0xba,0x05,0x00);
710 #if 0
711 iic(2,0x78,0x83,0x8c,0x00); /* brightness */
712 #endif
713 printk(".");
714
715 /* color correction */
716 iic(3,0x78,0x49,0x00,0x95); /* a */
717 iic(3,0x78,0x49,0x01,0x96); /* b */
718 iic(3,0x78,0x49,0x03,0x85); /* c */
719 iic(3,0x78,0x49,0x04,0x97); /* d */
720 iic(3,0x78,0x49,0x02,0x7e); /* e(Lo) */
721 iic(3,0x78,0x49,0x05,0xa4); /* f(Lo) */
722 iic(3,0x78,0x49,0x06,0x04); /* e(Hi) */
723 iic(3,0x78,0x49,0x07,0x04); /* e(Hi) */
724 iic(2,0x78,0x48,0x01,0x00); /* on=1 off=0 */
725
726 printk(".");
727 iic(2,0x78,0x11,0x00,0x00); /* end */
728 printk(" done\n");
729 return 0;
730 }
731
732
ar_release(struct video_device * vfd)733 void ar_release(struct video_device *vfd)
734 {
735 struct ar_device *ar = video_get_drvdata(vfd);
736 mutex_lock(&ar->lock);
737 video_device_release(vfd);
738 }
739
740 /****************************************************************************
741 *
742 * Video4Linux Module functions
743 *
744 ****************************************************************************/
745 static struct ar_device ardev;
746
ar_exclusive_open(struct file * file)747 static int ar_exclusive_open(struct file *file)
748 {
749 return test_and_set_bit(0, &ardev.in_use) ? -EBUSY : 0;
750 }
751
ar_exclusive_release(struct file * file)752 static int ar_exclusive_release(struct file *file)
753 {
754 clear_bit(0, &ardev.in_use);
755 return 0;
756 }
757
758 static const struct v4l2_file_operations ar_fops = {
759 .owner = THIS_MODULE,
760 .open = ar_exclusive_open,
761 .release = ar_exclusive_release,
762 .read = ar_read,
763 .ioctl = ar_ioctl,
764 };
765
766 static struct video_device ar_template = {
767 .name = "Colour AR VGA",
768 .fops = &ar_fops,
769 .release = ar_release,
770 .minor = -1,
771 };
772
773 #define ALIGN4(x) ((((int)(x)) & 0x3) == 0)
774
ar_init(void)775 static int __init ar_init(void)
776 {
777 struct ar_device *ar;
778 int ret;
779 int i;
780
781 DEBUG(1, "ar_init:\n");
782 ret = -EIO;
783 printk(KERN_INFO "arv: Colour AR VGA driver %s\n", VERSION);
784
785 ar = &ardev;
786 memset(ar, 0, sizeof(struct ar_device));
787
788 #if USE_INT
789 /* allocate a DMA buffer for 1 line. */
790 ar->line_buff = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL | GFP_DMA);
791 if (ar->line_buff == NULL || ! ALIGN4(ar->line_buff)) {
792 printk("arv: buffer allocation failed for DMA.\n");
793 ret = -ENOMEM;
794 goto out_end;
795 }
796 #endif
797 /* allocate buffers for a frame */
798 for (i = 0; i < MAX_AR_HEIGHT; i++) {
799 ar->frame[i] = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL);
800 if (ar->frame[i] == NULL || ! ALIGN4(ar->frame[i])) {
801 printk("arv: buffer allocation failed for frame.\n");
802 ret = -ENOMEM;
803 goto out_line_buff;
804 }
805 }
806
807 ar->vdev = video_device_alloc();
808 if (!ar->vdev) {
809 printk(KERN_ERR "arv: video_device_alloc() failed\n");
810 return -ENOMEM;
811 }
812 memcpy(ar->vdev, &ar_template, sizeof(ar_template));
813 video_set_drvdata(ar->vdev, ar);
814
815 if (vga) {
816 ar->width = AR_WIDTH_VGA;
817 ar->height = AR_HEIGHT_VGA;
818 ar->size = AR_SIZE_VGA;
819 ar->frame_bytes = AR_FRAME_BYTES_VGA;
820 ar->line_bytes = AR_LINE_BYTES_VGA;
821 if (vga_interlace)
822 ar->mode = AR_MODE_INTERLACE;
823 else
824 ar->mode = AR_MODE_NORMAL;
825 } else {
826 ar->width = AR_WIDTH_QVGA;
827 ar->height = AR_HEIGHT_QVGA;
828 ar->size = AR_SIZE_QVGA;
829 ar->frame_bytes = AR_FRAME_BYTES_QVGA;
830 ar->line_bytes = AR_LINE_BYTES_QVGA;
831 ar->mode = AR_MODE_INTERLACE;
832 }
833 mutex_init(&ar->lock);
834 init_waitqueue_head(&ar->wait);
835
836 #if USE_INT
837 if (request_irq(M32R_IRQ_INT3, ar_interrupt, 0, "arv", ar)) {
838 printk("arv: request_irq(%d) failed.\n", M32R_IRQ_INT3);
839 ret = -EIO;
840 goto out_irq;
841 }
842 #endif
843
844 if (ar_initialize(ar->vdev) != 0) {
845 printk("arv: M64278 not found.\n");
846 ret = -ENODEV;
847 goto out_dev;
848 }
849
850 /*
851 * ok, we can initialize h/w according to parameters,
852 * so register video device as a frame grabber type.
853 * device is named "video[0-64]".
854 * video_register_device() initializes h/w using ar_initialize().
855 */
856 if (video_register_device(ar->vdev, VFL_TYPE_GRABBER, video_nr) != 0) {
857 /* return -1, -ENFILE(full) or others */
858 printk("arv: register video (Colour AR) failed.\n");
859 ret = -ENODEV;
860 goto out_dev;
861 }
862
863 printk("video%d: Found M64278 VGA (IRQ %d, Freq %dMHz).\n",
864 ar->vdev->num, M32R_IRQ_INT3, freq);
865
866 return 0;
867
868 out_dev:
869 #if USE_INT
870 free_irq(M32R_IRQ_INT3, ar);
871
872 out_irq:
873 #endif
874 for (i = 0; i < MAX_AR_HEIGHT; i++)
875 kfree(ar->frame[i]);
876
877 out_line_buff:
878 #if USE_INT
879 kfree(ar->line_buff);
880
881 out_end:
882 #endif
883 return ret;
884 }
885
886
ar_init_module(void)887 static int __init ar_init_module(void)
888 {
889 freq = (boot_cpu_data.bus_clock / 1000000);
890 printk("arv: Bus clock %d\n", freq);
891 if (freq != 50 && freq != 75)
892 freq = DEFAULT_FREQ;
893 return ar_init();
894 }
895
ar_cleanup_module(void)896 static void __exit ar_cleanup_module(void)
897 {
898 struct ar_device *ar;
899 int i;
900
901 ar = &ardev;
902 video_unregister_device(ar->vdev);
903 #if USE_INT
904 free_irq(M32R_IRQ_INT3, ar);
905 #endif
906 for (i = 0; i < MAX_AR_HEIGHT; i++)
907 kfree(ar->frame[i]);
908 #if USE_INT
909 kfree(ar->line_buff);
910 #endif
911 }
912
913 module_init(ar_init_module);
914 module_exit(ar_cleanup_module);
915
916 MODULE_AUTHOR("Takeo Takahashi <takahashi.takeo@renesas.com>");
917 MODULE_DESCRIPTION("Colour AR M64278(VGA) for Video4Linux");
918 MODULE_LICENSE("GPL");
919