2 * Colour AR M64278(VGA) driver for Video4Linux
4 * Copyright (C) 2003 Takeo Takahashi <takahashi.takeo@renesas.com>
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.
11 * Some code is taken from AR driver sample program for M3T-M32700UT.
13 * AR driver sample (M32R SDK):
14 * Copyright (c) 2003 RENESAS TECHNOROGY CORPORATION
15 * AND RENESAS SOLUTIONS CORPORATION
16 * All Rights Reserved.
18 * 2003-09-01: Support w3cam by Takeo Takahashi
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/delay.h>
24 #include <linux/errno.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/slab.h>
30 #include <linux/sched.h>
31 #include <linux/videodev.h>
32 #include <media/v4l2-common.h>
33 #include <linux/mutex.h>
35 #include <asm/uaccess.h>
39 #include <asm/byteorder.h>
42 #define DEBUG(n, args...) printk(args)
45 #define DEBUG(n, args...)
50 * USE_INT is always 0, interrupt mode is not available
51 * on linux due to lack of speed
53 #define USE_INT 0 /* Don't modify */
55 #define VERSION "0.03"
57 #define ar_inl(addr) inl((unsigned long)(addr))
58 #define ar_outl(val, addr) outl((unsigned long)(val),(unsigned long)(addr))
60 extern struct cpuinfo_m32r boot_cpu_data;
64 * Note that M32700UT does not support CIF mode, but QVGA is
65 * supported by M32700UT hardware using VGA mode of AR LSI.
67 * Supported: VGA (Normal mode, Interlace mode)
68 * QVGA (Always Interlace mode of VGA)
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
80 /* bits & bytes per pixel */
81 #define AR_BITS_PER_PIXEL 16
82 #define AR_BYTES_PER_PIXEL (AR_BITS_PER_PIXEL/8)
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
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)
97 #define AR_MAX_FRAME 15
100 #define AR_SIZE_VGA 0
101 #define AR_SIZE_QVGA 1
104 #define AR_MODE_INTERLACE 0
105 #define AR_MODE_NORMAL 1
108 struct video_device *vdev;
109 unsigned int start_capture; /* duaring capture in INT. mode. */
111 unsigned char *line_buff; /* DMA line buffer */
113 unsigned char *frame[MAX_AR_HEIGHT]; /* frame data */
114 short size; /* capture size */
115 short mode; /* capture mode */
117 int frame_bytes, line_bytes;
118 wait_queue_head_t wait;
122 static int video_nr = -1; /* video device number (first free) */
123 static unsigned char yuv[MAX_AR_FRAME_BYTES];
125 /* module parameters */
126 /* default frequency */
127 #define DEFAULT_FREQ 50 /* 50 or 75 (MHz) is available as BCLK */
128 static int freq = DEFAULT_FREQ; /* BCLK: available 50 or 70 (MHz) */
129 static int vga = 0; /* default mode(0:QVGA mode, other:VGA mode) */
130 static int vga_interlace = 0; /* 0 is normal mode for, else interlace mode */
131 module_param(freq, int, 0);
132 module_param(vga, int, 0);
133 module_param(vga_interlace, int, 0);
135 static int ar_initialize(struct video_device *dev);
137 static inline void wait_for_vsync(void)
139 while (ar_inl(ARVCR0) & ARVCR0_VDS) /* wait for VSYNC */
141 while (!(ar_inl(ARVCR0) & ARVCR0_VDS)) /* wait for VSYNC */
145 static inline void wait_acknowledge(void)
149 for (i = 0; i < 1000; i++)
151 while (ar_inl(PLDI2CSTS) & PLDI2CSTS_NOACK)
155 /*******************************************************************
157 *******************************************************************/
158 void iic(int n, unsigned long addr, unsigned long data1, unsigned long data2,
164 ar_outl(addr, PLDI2CDATA);
168 ar_outl(1, PLDI2CCND);
171 /* Transfer data 1 */
172 ar_outl(data1, PLDI2CDATA);
174 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
177 /* Transfer data 2 */
178 ar_outl(data2, PLDI2CDATA);
180 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
184 /* Transfer data 3 */
185 ar_outl(data3, PLDI2CDATA);
187 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
192 for (i = 0; i < 100; i++)
194 ar_outl(2, PLDI2CCND);
195 ar_outl(2, PLDI2CCND);
197 while (ar_inl(PLDI2CSTS) & PLDI2CSTS_BB)
204 DEBUG(1, "init_iic:\n");
210 ar_outl(0x0, PLDI2CCR); /* I2CCR Disable */
211 ar_outl(0x0300, PLDI2CMOD); /* I2CMOD ACK/8b-data/7b-addr/auto */
212 ar_outl(0x1, PLDI2CACK); /* I2CACK ACK */
217 ar_outl(369, PLDI2CFREQ); /* BCLK = 75MHz */
218 } else if (freq == 50) {
219 ar_outl(244, PLDI2CFREQ); /* BCLK = 50MHz */
221 ar_outl(244, PLDI2CFREQ); /* default: BCLK = 50MHz */
223 ar_outl(0x1, PLDI2CCR); /* I2CCR Enable */
226 /**************************************************************************
228 * Video4Linux Interface functions
230 **************************************************************************/
232 static inline void disable_dma(void)
234 ar_outl(0x8000, M32R_DMAEN_PORTL); /* disable DMA0 */
237 static inline void enable_dma(void)
239 ar_outl(0x8080, M32R_DMAEN_PORTL); /* enable DMA0 */
242 static inline void clear_dma_status(void)
244 ar_outl(0x8000, M32R_DMAEDET_PORTL); /* clear status */
247 static inline void wait_for_vertical_sync(int exp_line)
250 int tmout = 10000; /* FIXME */
254 * check HCOUNT because we cannot check vertical sync.
256 for (; tmout >= 0; tmout--) {
257 l = ar_inl(ARVHCOUNT);
262 printk("arv: lost %d -> %d\n", exp_line, l);
264 while (ar_inl(ARVHCOUNT) != exp_line)
269 static ssize_t ar_read(struct file *file, char *buf, size_t count, loff_t *ppos)
271 struct video_device *v = video_devdata(file);
272 struct ar_device *ar = v->priv;
273 long ret = ar->frame_bytes; /* return read bytes */
274 unsigned long arvcr1 = 0;
278 unsigned char *py, *pu, *pv;
283 DEBUG(1, "ar_read()\n");
285 if (ar->size == AR_SIZE_QVGA)
286 arvcr1 |= ARVCR1_QVGA;
287 if (ar->mode == AR_MODE_NORMAL)
288 arvcr1 |= ARVCR1_NORMAL;
290 mutex_lock(&ar->lock);
293 local_irq_save(flags);
295 ar_outl(0xa1871300, M32R_DMA0CR0_PORTL);
296 ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
298 /* set AR FIFO address as source(BSEL5) */
299 ar_outl(ARDATA32, M32R_DMA0CSA_PORTL);
300 ar_outl(ARDATA32, M32R_DMA0RSA_PORTL);
301 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* destination addr. */
302 ar_outl(ar->line_buff, M32R_DMA0RDA_PORTL); /* reload address */
303 ar_outl(ar->line_bytes, M32R_DMA0CBCUT_PORTL); /* byte count (bytes) */
304 ar_outl(ar->line_bytes, M32R_DMA0RBCUT_PORTL); /* reload count (bytes) */
307 * Okey , kicks AR LSI to invoke an interrupt
309 ar->start_capture = 0;
310 ar_outl(arvcr1 | ARVCR1_HIEN, ARVCR1);
311 local_irq_restore(flags);
312 /* .... AR interrupts .... */
313 interruptible_sleep_on(&ar->wait);
314 if (signal_pending(current)) {
315 printk("arv: interrupted while get frame data.\n");
319 #else /* ! USE_INT */
321 ar_outl(arvcr1, ARVCR1);
323 ar_outl(0x8000, M32R_DMAEDET_PORTL);
324 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
325 ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
326 ar_outl(ARDATA32, M32R_DMA0CSA_PORTL);
327 ar_outl(ARDATA32, M32R_DMA0RSA_PORTL);
328 ar_outl(ar->line_bytes, M32R_DMA0CBCUT_PORTL);
329 ar_outl(ar->line_bytes, M32R_DMA0RBCUT_PORTL);
331 local_irq_save(flags);
332 while (ar_inl(ARVHCOUNT) != 0) /* wait for 0 */
334 if (ar->mode == AR_MODE_INTERLACE && ar->size == AR_SIZE_VGA) {
335 for (h = 0; h < ar->height; h++) {
336 wait_for_vertical_sync(h);
337 if (h < (AR_HEIGHT_VGA/2))
340 l = (((h - (AR_HEIGHT_VGA/2)) << 1) + 1);
341 ar_outl(virt_to_phys(ar->frame[l]), M32R_DMA0CDA_PORTL);
343 while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
347 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
350 for (h = 0; h < ar->height; h++) {
351 wait_for_vertical_sync(h);
352 ar_outl(virt_to_phys(ar->frame[h]), M32R_DMA0CDA_PORTL);
354 while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
358 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
361 local_irq_restore(flags);
362 #endif /* ! USE_INT */
365 * convert YUV422 to YUV422P
366 * +--------------------+
368 * | ..............Yn |
369 * +--------------------+
370 * | U0,U1,........Un |
371 * +--------------------+
372 * | V0,V1,........Vn |
373 * +--------------------+
376 pu = py + (ar->frame_bytes / 2);
377 pv = pu + (ar->frame_bytes / 4);
378 for (h = 0; h < ar->height; h++) {
380 for (w = 0; w < ar->line_bytes; w += 4) {
387 if (copy_to_user(buf, yuv, ar->frame_bytes)) {
388 printk("arv: failed while copy_to_user yuv.\n");
392 DEBUG(1, "ret = %d\n", ret);
394 mutex_unlock(&ar->lock);
398 static int ar_do_ioctl(struct inode *inode, struct file *file,
399 unsigned int cmd, void *arg)
401 struct video_device *dev = video_devdata(file);
402 struct ar_device *ar = dev->priv;
404 DEBUG(1, "ar_ioctl()\n");
408 struct video_capability *b = arg;
409 DEBUG(1, "VIDIOCGCAP:\n");
410 strcpy(b->name, ar->vdev->name);
411 b->type = VID_TYPE_CAPTURE;
414 b->maxwidth = MAX_AR_WIDTH;
415 b->maxheight = MAX_AR_HEIGHT;
416 b->minwidth = MIN_AR_WIDTH;
417 b->minheight = MIN_AR_HEIGHT;
421 DEBUG(1, "VIDIOCGCHAN:\n");
424 DEBUG(1, "VIDIOCSCHAN:\n");
427 DEBUG(1, "VIDIOCGTUNER:\n");
430 DEBUG(1, "VIDIOCSTUNER:\n");
433 DEBUG(1, "VIDIOCGPICT:\n");
436 DEBUG(1, "VIDIOCSPICT:\n");
439 DEBUG(1, "VIDIOCCAPTURE:\n");
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;
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))
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;
466 ar->mode = AR_MODE_INTERLACE;
468 ar->mode = AR_MODE_NORMAL;
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;
475 mutex_unlock(&ar->lock);
479 DEBUG(1, "VIDIOCGFBUF:\n");
482 DEBUG(1, "VIDIOCSFBUF:\n");
485 DEBUG(1, "VIDIOCKEY:\n");
488 DEBUG(1, "VIDIOCGFREQ:\n");
491 DEBUG(1, "VIDIOCSFREQ:\n");
494 DEBUG(1, "VIDIOCGAUDIO:\n");
497 DEBUG(1, "VIDIOCSAUDIO:\n");
500 DEBUG(1, "VIDIOCSYNC:\n");
503 DEBUG(1, "VIDIOCMCAPTURE:\n");
506 DEBUG(1, "VIDIOCGMBUF:\n");
509 DEBUG(1, "VIDIOCGUNIT:\n");
512 DEBUG(1, "VIDIOCGCAPTURE:\n");
515 DEBUG(1, "VIDIOCSCAPTURE:\n");
517 case VIDIOCSPLAYMODE:
518 DEBUG(1, "VIDIOCSPLAYMODE:\n");
520 case VIDIOCSWRITEMODE:
521 DEBUG(1, "VIDIOCSWRITEMODE:\n");
523 case VIDIOCGPLAYINFO:
524 DEBUG(1, "VIDIOCGPLAYINFO:\n");
526 case VIDIOCSMICROCODE:
527 DEBUG(1, "VIDIOCSMICROCODE:\n");
530 DEBUG(1, "VIDIOCGVBIFMT:\n");
533 DEBUG(1, "VIDIOCSVBIFMT:\n");
536 DEBUG(1, "Unknown ioctl(0x%08x)\n", cmd);
542 static int ar_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
545 return video_usercopy(inode, file, cmd, arg, ar_do_ioctl);
552 static void ar_interrupt(int irq, void *dev, struct pt_regs *regs)
554 struct ar_device *ar = dev;
555 unsigned int line_count;
556 unsigned int line_number;
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);
566 (((line_count - (AR_HEIGHT_VGA/2)) << 1) + 1);
568 line_number = line_count;
571 if (line_number == 0) {
573 * It is an interrupt for line 0.
574 * we have to start capture.
578 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* needless? */
580 memcpy(ar->frame[0], ar->line_buff, ar->line_bytes);
582 ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
585 ar->start_capture = 1; /* during capture */
589 if (ar->start_capture == 1 && line_number <= (ar->height - 1)) {
591 memcpy(ar->frame[line_number], ar->line_buff, ar->line_bytes);
594 * if captured all line of a frame, disable AR interrupt
595 * and wake a process up.
597 if (line_number == (ar->height - 1)) { /* end of line */
599 ar->start_capture = 0;
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);
608 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL);
609 ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
619 * ar_initialize() is called by video_register_device() and
620 * initializes AR LSI and peripherals.
622 * -1 is returned in all failures.
623 * 0 is returned in success.
626 static int ar_initialize(struct video_device *dev)
628 struct ar_device *ar = dev->priv;
629 unsigned long cr = 0;
632 DEBUG(1, "ar_initialize:\n");
637 ar_outl(0, ARVCR0); /* assert reset of AR LSI */
638 for (i = 0; i < 0x18; i++) /* wait for over 10 cycles @ 27MHz */
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 */
644 /* AR uses INT3 of CPU as interrupt pin. */
645 ar_outl(ARINTSEL_INT3, ARINTSEL);
647 if (ar->size == AR_SIZE_QVGA)
649 if (ar->mode == AR_MODE_NORMAL)
654 * Initialize IIC so that CPU can communicate with AR LSI,
655 * and send boot commands to AR LSI.
659 for (i = 0; i < 0x100000; i++) { /* > 0xa1d10, 56ms */
660 if ((ar_inl(ARVCR0) & ARVCR0_VDS)) { /* VSYNC */
669 printk("arv: Initializing ");
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);
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);
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);
689 iic(2,0x78,0x8e,0x0c,0x00);
690 iic(2,0x78,0x8f,0x00,0x00);
692 iic(2,0x78,0x90,0x00,0x00); /* AWB on=1 off=0 */
694 iic(2,0x78,0x93,0x01,0x00);
695 iic(2,0x78,0x94,0xcd,0x00);
696 iic(2,0x78,0x95,0x00,0x00);
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);
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);
711 iic(2,0x78,0x83,0x8c,0x00); /* brightness */
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 */
727 iic(2,0x78,0x11,0x00,0x00); /* end */
733 void ar_release(struct video_device *vfd)
735 struct ar_device *ar = vfd->priv;
736 mutex_lock(&ar->lock);
737 video_device_release(vfd);
740 /****************************************************************************
742 * Video4Linux Module functions
744 ****************************************************************************/
745 static struct file_operations ar_fops = {
746 .owner = THIS_MODULE,
747 .open = video_exclusive_open,
748 .release = video_exclusive_release,
751 .compat_ioctl = v4l_compat_ioctl32,
755 static struct video_device ar_template = {
756 .owner = THIS_MODULE,
757 .name = "Colour AR VGA",
758 .type = VID_TYPE_CAPTURE,
759 .hardware = VID_HARDWARE_ARV,
761 .release = ar_release,
765 #define ALIGN4(x) ((((int)(x)) & 0x3) == 0)
766 static struct ar_device ardev;
768 static int __init ar_init(void)
770 struct ar_device *ar;
774 DEBUG(1, "ar_init:\n");
776 printk(KERN_INFO "arv: Colour AR VGA driver %s\n", VERSION);
779 memset(ar, 0, sizeof(struct ar_device));
782 /* allocate a DMA buffer for 1 line. */
783 ar->line_buff = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL | GFP_DMA);
784 if (ar->line_buff == NULL || ! ALIGN4(ar->line_buff)) {
785 printk("arv: buffer allocation failed for DMA.\n");
790 /* allocate buffers for a frame */
791 for (i = 0; i < MAX_AR_HEIGHT; i++) {
792 ar->frame[i] = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL);
793 if (ar->frame[i] == NULL || ! ALIGN4(ar->frame[i])) {
794 printk("arv: buffer allocation failed for frame.\n");
800 ar->vdev = video_device_alloc();
802 printk(KERN_ERR "arv: video_device_alloc() failed\n");
805 memcpy(ar->vdev, &ar_template, sizeof(ar_template));
809 ar->width = AR_WIDTH_VGA;
810 ar->height = AR_HEIGHT_VGA;
811 ar->size = AR_SIZE_VGA;
812 ar->frame_bytes = AR_FRAME_BYTES_VGA;
813 ar->line_bytes = AR_LINE_BYTES_VGA;
815 ar->mode = AR_MODE_INTERLACE;
817 ar->mode = AR_MODE_NORMAL;
819 ar->width = AR_WIDTH_QVGA;
820 ar->height = AR_HEIGHT_QVGA;
821 ar->size = AR_SIZE_QVGA;
822 ar->frame_bytes = AR_FRAME_BYTES_QVGA;
823 ar->line_bytes = AR_LINE_BYTES_QVGA;
824 ar->mode = AR_MODE_INTERLACE;
826 mutex_init(&ar->lock);
827 init_waitqueue_head(&ar->wait);
830 if (request_irq(M32R_IRQ_INT3, ar_interrupt, 0, "arv", ar)) {
831 printk("arv: request_irq(%d) failed.\n", M32R_IRQ_INT3);
837 if (ar_initialize(ar->vdev) != 0) {
838 printk("arv: M64278 not found.\n");
844 * ok, we can initialize h/w according to parameters,
845 * so register video device as a frame grabber type.
846 * device is named "video[0-64]".
847 * video_register_device() initializes h/w using ar_initialize().
849 if (video_register_device(ar->vdev, VFL_TYPE_GRABBER, video_nr) != 0) {
850 /* return -1, -ENFILE(full) or others */
851 printk("arv: register video (Colour AR) failed.\n");
856 printk("video%d: Found M64278 VGA (IRQ %d, Freq %dMHz).\n",
857 ar->vdev->minor, M32R_IRQ_INT3, freq);
863 free_irq(M32R_IRQ_INT3, ar);
867 for (i = 0; i < MAX_AR_HEIGHT; i++)
872 kfree(ar->line_buff);
880 static int __init ar_init_module(void)
882 freq = (boot_cpu_data.bus_clock / 1000000);
883 printk("arv: Bus clock %d\n", freq);
884 if (freq != 50 && freq != 75)
889 static void __exit ar_cleanup_module(void)
891 struct ar_device *ar;
895 video_unregister_device(ar->vdev);
897 free_irq(M32R_IRQ_INT3, ar);
899 for (i = 0; i < MAX_AR_HEIGHT; i++)
902 kfree(ar->line_buff);
906 module_init(ar_init_module);
907 module_exit(ar_cleanup_module);
909 MODULE_AUTHOR("Takeo Takahashi <takahashi.takeo@renesas.com>");
910 MODULE_DESCRIPTION("Colour AR M64278(VGA) for Video4Linux");
911 MODULE_LICENSE("GPL");