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Btrfs: stop the readahead threads on failed mount
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / arv.c
blobb6ed44aebe30bcf1c186bd877125bca353e6bb96
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/videodev2.h>
31 #include <media/v4l2-common.h>
32 #include <media/v4l2-device.h>
33 #include <media/v4l2-ioctl.h>
34 #include <linux/mutex.h>
35
36 #include <asm/uaccess.h>
37 #include <asm/m32r.h>
38 #include <asm/io.h>
39 #include <asm/dma.h>
40 #include <asm/byteorder.h>
41
42 #if 0
43 #define DEBUG(n, args...) printk(KERN_INFO args)
44 #define CHECK_LOST 1
45 #else
46 #define DEBUG(n, args...)
47 #define CHECK_LOST 0
48 #endif
49
50 /*
51 * USE_INT is always 0, interrupt mode is not available
52 * on linux due to lack of speed
53 */
54 #define USE_INT 0 /* Don't modify */
55
56 #define VERSION "0.0.5"
57
58 #define ar_inl(addr) inl((unsigned long)(addr))
59 #define ar_outl(val, addr) outl((unsigned long)(val), (unsigned long)(addr))
60
61 extern struct cpuinfo_m32r boot_cpu_data;
62
63 /*
64 * CCD pixel size
65 * Note that M32700UT does not support CIF mode, but QVGA is
66 * supported by M32700UT hardware using VGA mode of AR LSI.
67 *
68 * Supported: VGA (Normal mode, Interlace mode)
69 * QVGA (Always Interlace mode of VGA)
70 *
71 */
72 #define AR_WIDTH_VGA 640
73 #define AR_HEIGHT_VGA 480
74 #define AR_WIDTH_QVGA 320
75 #define AR_HEIGHT_QVGA 240
76 #define MIN_AR_WIDTH AR_WIDTH_QVGA
77 #define MIN_AR_HEIGHT AR_HEIGHT_QVGA
78 #define MAX_AR_WIDTH AR_WIDTH_VGA
79 #define MAX_AR_HEIGHT AR_HEIGHT_VGA
80
81 /* bits & bytes per pixel */
82 #define AR_BITS_PER_PIXEL 16
83 #define AR_BYTES_PER_PIXEL (AR_BITS_PER_PIXEL / 8)
84
85 /* line buffer size */
86 #define AR_LINE_BYTES_VGA (AR_WIDTH_VGA * AR_BYTES_PER_PIXEL)
87 #define AR_LINE_BYTES_QVGA (AR_WIDTH_QVGA * AR_BYTES_PER_PIXEL)
88 #define MAX_AR_LINE_BYTES AR_LINE_BYTES_VGA
89
90 /* frame size & type */
91 #define AR_FRAME_BYTES_VGA \
92 (AR_WIDTH_VGA * AR_HEIGHT_VGA * AR_BYTES_PER_PIXEL)
93 #define AR_FRAME_BYTES_QVGA \
94 (AR_WIDTH_QVGA * AR_HEIGHT_QVGA * AR_BYTES_PER_PIXEL)
95 #define MAX_AR_FRAME_BYTES \
96 (MAX_AR_WIDTH * MAX_AR_HEIGHT * AR_BYTES_PER_PIXEL)
97
98 #define AR_MAX_FRAME 15
99
100 /* capture size */
101 #define AR_SIZE_VGA 0
102 #define AR_SIZE_QVGA 1
103
104 /* capture mode */
105 #define AR_MODE_INTERLACE 0
106 #define AR_MODE_NORMAL 1
107
108 struct ar {
109 struct v4l2_device v4l2_dev;
110 struct video_device vdev;
111 unsigned int start_capture; /* duaring capture in INT. mode. */
112 #if USE_INT
113 unsigned char *line_buff; /* DMA line buffer */
114 #endif
115 unsigned char *frame[MAX_AR_HEIGHT]; /* frame data */
116 short size; /* capture size */
117 short mode; /* capture mode */
118 int width, height;
119 int frame_bytes, line_bytes;
120 wait_queue_head_t wait;
121 struct mutex lock;
122 };
123
124 static struct ar ardev;
125
126 static int video_nr = -1; /* video device number (first free) */
127 static unsigned char yuv[MAX_AR_FRAME_BYTES];
128
129 /* module parameters */
130 /* default frequency */
131 #define DEFAULT_FREQ 50 /* 50 or 75 (MHz) is available as BCLK */
132 static int freq = DEFAULT_FREQ; /* BCLK: available 50 or 70 (MHz) */
133 static int vga; /* default mode(0:QVGA mode, other:VGA mode) */
134 static int vga_interlace; /* 0 is normal mode for, else interlace mode */
135 module_param(freq, int, 0);
136 module_param(vga, int, 0);
137 module_param(vga_interlace, int, 0);
138
139 static void wait_for_vsync(void)
140 {
141 while (ar_inl(ARVCR0) & ARVCR0_VDS) /* wait for VSYNC */
142 cpu_relax();
143 while (!(ar_inl(ARVCR0) & ARVCR0_VDS)) /* wait for VSYNC */
144 cpu_relax();
145 }
146
147 static void wait_acknowledge(void)
148 {
149 int i;
150
151 for (i = 0; i < 1000; i++)
152 cpu_relax();
153 while (ar_inl(PLDI2CSTS) & PLDI2CSTS_NOACK)
154 cpu_relax();
155 }
156
157 /*******************************************************************
158 * I2C functions
159 *******************************************************************/
160 static void iic(int n, unsigned long addr, unsigned long data1, unsigned long data2,
161 unsigned long data3)
162 {
163 int i;
164
165 /* Slave Address */
166 ar_outl(addr, PLDI2CDATA);
167 wait_for_vsync();
168
169 /* Start */
170 ar_outl(1, PLDI2CCND);
171 wait_acknowledge();
172
173 /* Transfer data 1 */
174 ar_outl(data1, PLDI2CDATA);
175 wait_for_vsync();
176 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
177 wait_acknowledge();
178
179 /* Transfer data 2 */
180 ar_outl(data2, PLDI2CDATA);
181 wait_for_vsync();
182 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
183 wait_acknowledge();
184
185 if (n == 3) {
186 /* Transfer data 3 */
187 ar_outl(data3, PLDI2CDATA);
188 wait_for_vsync();
189 ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
190 wait_acknowledge();
191 }
192
193 /* Stop */
194 for (i = 0; i < 100; i++)
195 cpu_relax();
196 ar_outl(2, PLDI2CCND);
197 ar_outl(2, PLDI2CCND);
198
199 while (ar_inl(PLDI2CSTS) & PLDI2CSTS_BB)
200 cpu_relax();
201 }
202
203
204 static void init_iic(void)
205 {
206 DEBUG(1, "init_iic:\n");
207
208 /*
209 * ICU Setting (iic)
210 */
211 /* I2C Setting */
212 ar_outl(0x0, PLDI2CCR); /* I2CCR Disable */
213 ar_outl(0x0300, PLDI2CMOD); /* I2CMOD ACK/8b-data/7b-addr/auto */
214 ar_outl(0x1, PLDI2CACK); /* I2CACK ACK */
215
216 /* I2C CLK */
217 /* 50MH-100k */
218 if (freq == 75)
219 ar_outl(369, PLDI2CFREQ); /* BCLK = 75MHz */
220 else if (freq == 50)
221 ar_outl(244, PLDI2CFREQ); /* BCLK = 50MHz */
222 else
223 ar_outl(244, PLDI2CFREQ); /* default: BCLK = 50MHz */
224 ar_outl(0x1, PLDI2CCR); /* I2CCR Enable */
225 }
226
227 /**************************************************************************
228 *
229 * Video4Linux Interface functions
230 *
231 **************************************************************************/
232
233 static inline void disable_dma(void)
234 {
235 ar_outl(0x8000, M32R_DMAEN_PORTL); /* disable DMA0 */
236 }
237
238 static inline void enable_dma(void)
239 {
240 ar_outl(0x8080, M32R_DMAEN_PORTL); /* enable DMA0 */
241 }
242
243 static inline void clear_dma_status(void)
244 {
245 ar_outl(0x8000, M32R_DMAEDET_PORTL); /* clear status */
246 }
247
248 static void wait_for_vertical_sync(struct ar *ar, 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 v4l2_err(&ar->v4l2_dev, "lost %d -> %d\n", exp_line, l);
264 #else
265 while (ar_inl(ARVHCOUNT) != exp_line)
266 cpu_relax();
267 #endif
268 }
269
270 static ssize_t ar_read(struct file *file, char *buf, size_t count, loff_t *ppos)
271 {
272 struct ar *ar = video_drvdata(file);
273 long ret = ar->frame_bytes; /* return read bytes */
274 unsigned long arvcr1 = 0;
275 unsigned long flags;
276 unsigned char *p;
277 int h, w;
278 unsigned char *py, *pu, *pv;
279 #if !USE_INT
280 int l;
281 #endif
282
283 DEBUG(1, "ar_read()\n");
284
285 if (ar->size == AR_SIZE_QVGA)
286 arvcr1 |= ARVCR1_QVGA;
287 if (ar->mode == AR_MODE_NORMAL)
288 arvcr1 |= ARVCR1_NORMAL;
289
290 mutex_lock(&ar->lock);
291
292 #if USE_INT
293 local_irq_save(flags);
294 disable_dma();
295 ar_outl(0xa1871300, M32R_DMA0CR0_PORTL);
296 ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
297
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) */
305
306 /*
307 * Okay, kick AR LSI to invoke an interrupt
308 */
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(KERN_ERR "arv: interrupted while get frame data.\n");
316 ret = -EINTR;
317 goto out_up;
318 }
319 #else /* ! USE_INT */
320 /* polling */
321 ar_outl(arvcr1, ARVCR1);
322 disable_dma();
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);
330
331 local_irq_save(flags);
332 while (ar_inl(ARVHCOUNT) != 0) /* wait for 0 */
333 cpu_relax();
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(ar, h);
337 if (h < (AR_HEIGHT_VGA/2))
338 l = h << 1;
339 else
340 l = (((h - (AR_HEIGHT_VGA/2)) << 1) + 1);
341 ar_outl(virt_to_phys(ar->frame[l]), M32R_DMA0CDA_PORTL);
342 enable_dma();
343 while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
344 cpu_relax();
345 disable_dma();
346 clear_dma_status();
347 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
348 }
349 } else {
350 for (h = 0; h < ar->height; h++) {
351 wait_for_vertical_sync(ar, h);
352 ar_outl(virt_to_phys(ar->frame[h]), M32R_DMA0CDA_PORTL);
353 enable_dma();
354 while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
355 cpu_relax();
356 disable_dma();
357 clear_dma_status();
358 ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
359 }
360 }
361 local_irq_restore(flags);
362 #endif /* ! USE_INT */
363
364 /*
365 * convert YUV422 to YUV422P
366 * +--------------------+
367 * | Y0,Y1,... |
368 * | ..............Yn |
369 * +--------------------+
370 * | U0,U1,........Un |
371 * +--------------------+
372 * | V0,V1,........Vn |
373 * +--------------------+
374 */
375 py = yuv;
376 pu = py + (ar->frame_bytes / 2);
377 pv = pu + (ar->frame_bytes / 4);
378 for (h = 0; h < ar->height; h++) {
379 p = ar->frame[h];
380 for (w = 0; w < ar->line_bytes; w += 4) {
381 *py++ = *p++;
382 *pu++ = *p++;
383 *py++ = *p++;
384 *pv++ = *p++;
385 }
386 }
387 if (copy_to_user(buf, yuv, ar->frame_bytes)) {
388 v4l2_err(&ar->v4l2_dev, "failed while copy_to_user yuv.\n");
389 ret = -EFAULT;
390 goto out_up;
391 }
392 DEBUG(1, "ret = %d\n", ret);
393 out_up:
394 mutex_unlock(&ar->lock);
395 return ret;
396 }
397
398 static int ar_querycap(struct file *file, void *priv,
399 struct v4l2_capability *vcap)
400 {
401 struct ar *ar = video_drvdata(file);
402
403 strlcpy(vcap->driver, ar->vdev.name, sizeof(vcap->driver));
404 strlcpy(vcap->card, "Colour AR VGA", sizeof(vcap->card));
405 strlcpy(vcap->bus_info, "Platform", sizeof(vcap->bus_info));
406 vcap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
407 return 0;
408 }
409
410 static int ar_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
411 {
412 if (vin->index > 0)
413 return -EINVAL;
414 strlcpy(vin->name, "Camera", sizeof(vin->name));
415 vin->type = V4L2_INPUT_TYPE_CAMERA;
416 vin->audioset = 0;
417 vin->tuner = 0;
418 vin->std = V4L2_STD_ALL;
419 vin->status = 0;
420 return 0;
421 }
422
423 static int ar_g_input(struct file *file, void *fh, unsigned int *inp)
424 {
425 *inp = 0;
426 return 0;
427 }
428
429 static int ar_s_input(struct file *file, void *fh, unsigned int inp)
430 {
431 return inp ? -EINVAL : 0;
432 }
433
434 static int ar_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
435 {
436 struct ar *ar = video_drvdata(file);
437 struct v4l2_pix_format *pix = &fmt->fmt.pix;
438
439 pix->width = ar->width;
440 pix->height = ar->height;
441 pix->pixelformat = V4L2_PIX_FMT_YUV422P;
442 pix->field = (ar->mode == AR_MODE_NORMAL) ? V4L2_FIELD_NONE : V4L2_FIELD_INTERLACED;
443 pix->bytesperline = ar->width;
444 pix->sizeimage = 2 * ar->width * ar->height;
445 /* Just a guess */
446 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
447 return 0;
448 }
449
450 static int ar_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
451 {
452 struct ar *ar = video_drvdata(file);
453 struct v4l2_pix_format *pix = &fmt->fmt.pix;
454
455 if (pix->height <= AR_HEIGHT_QVGA || pix->width <= AR_WIDTH_QVGA) {
456 pix->height = AR_HEIGHT_QVGA;
457 pix->width = AR_WIDTH_QVGA;
458 pix->field = V4L2_FIELD_INTERLACED;
459 } else {
460 pix->height = AR_HEIGHT_VGA;
461 pix->width = AR_WIDTH_VGA;
462 pix->field = vga_interlace ? V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE;
463 }
464 pix->pixelformat = V4L2_PIX_FMT_YUV422P;
465 pix->bytesperline = ar->width;
466 pix->sizeimage = 2 * ar->width * ar->height;
467 /* Just a guess */
468 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
469 return 0;
470 }
471
472 static int ar_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
473 {
474 struct ar *ar = video_drvdata(file);
475 struct v4l2_pix_format *pix = &fmt->fmt.pix;
476 int ret = ar_try_fmt_vid_cap(file, fh, fmt);
477
478 if (ret)
479 return ret;
480 mutex_lock(&ar->lock);
481 ar->width = pix->width;
482 ar->height = pix->height;
483 if (ar->width == AR_WIDTH_VGA) {
484 ar->size = AR_SIZE_VGA;
485 ar->frame_bytes = AR_FRAME_BYTES_VGA;
486 ar->line_bytes = AR_LINE_BYTES_VGA;
487 if (vga_interlace)
488 ar->mode = AR_MODE_INTERLACE;
489 else
490 ar->mode = AR_MODE_NORMAL;
491 } else {
492 ar->size = AR_SIZE_QVGA;
493 ar->frame_bytes = AR_FRAME_BYTES_QVGA;
494 ar->line_bytes = AR_LINE_BYTES_QVGA;
495 ar->mode = AR_MODE_INTERLACE;
496 }
497 /* Ok we figured out what to use from our wide choice */
498 mutex_unlock(&ar->lock);
499 return 0;
500 }
501
502 static int ar_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
503 {
504 static struct v4l2_fmtdesc formats[] = {
505 { 0, 0, 0,
506 "YUV 4:2:2 Planar", V4L2_PIX_FMT_YUV422P,
507 { 0, 0, 0, 0 }
508 },
509 };
510 enum v4l2_buf_type type = fmt->type;
511
512 if (fmt->index > 0)
513 return -EINVAL;
514
515 *fmt = formats[fmt->index];
516 fmt->type = type;
517 return 0;
518 }
519
520 #if USE_INT
521 /*
522 * Interrupt handler
523 */
524 static void ar_interrupt(int irq, void *dev)
525 {
526 struct ar *ar = dev;
527 unsigned int line_count;
528 unsigned int line_number;
529 unsigned int arvcr1;
530
531 line_count = ar_inl(ARVHCOUNT); /* line number */
532 if (ar->mode == AR_MODE_INTERLACE && ar->size == AR_SIZE_VGA) {
533 /* operations for interlace mode */
534 if (line_count < (AR_HEIGHT_VGA / 2)) /* even line */
535 line_number = (line_count << 1);
536 else /* odd line */
537 line_number =
538 (((line_count - (AR_HEIGHT_VGA / 2)) << 1) + 1);
539 } else {
540 line_number = line_count;
541 }
542
543 if (line_number == 0) {
544 /*
545 * It is an interrupt for line 0.
546 * we have to start capture.
547 */
548 disable_dma();
549 #if 0
550 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* needless? */
551 #endif
552 memcpy(ar->frame[0], ar->line_buff, ar->line_bytes);
553 #if 0
554 ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
555 #endif
556 enable_dma();
557 ar->start_capture = 1; /* during capture */
558 return;
559 }
560
561 if (ar->start_capture == 1 && line_number <= (ar->height - 1)) {
562 disable_dma();
563 memcpy(ar->frame[line_number], ar->line_buff, ar->line_bytes);
564
565 /*
566 * if captured all line of a frame, disable AR interrupt
567 * and wake a process up.
568 */
569 if (line_number == (ar->height - 1)) { /* end of line */
570
571 ar->start_capture = 0;
572
573 /* disable AR interrupt request */
574 arvcr1 = ar_inl(ARVCR1);
575 arvcr1 &= ~ARVCR1_HIEN; /* clear int. flag */
576 ar_outl(arvcr1, ARVCR1); /* disable */
577 wake_up_interruptible(&ar->wait);
578 } else {
579 #if 0
580 ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL);
581 ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
582 #endif
583 enable_dma();
584 }
585 }
586 }
587 #endif
588
589 /*
590 * ar_initialize()
591 * ar_initialize() is called by video_register_device() and
592 * initializes AR LSI and peripherals.
593 *
594 * -1 is returned in all failures.
595 * 0 is returned in success.
596 *
597 */
598 static int ar_initialize(struct ar *ar)
599 {
600 unsigned long cr = 0;
601 int i, found = 0;
602
603 DEBUG(1, "ar_initialize:\n");
604
605 /*
606 * initialize AR LSI
607 */
608 ar_outl(0, ARVCR0); /* assert reset of AR LSI */
609 for (i = 0; i < 0x18; i++) /* wait for over 10 cycles @ 27MHz */
610 cpu_relax();
611 ar_outl(ARVCR0_RST, ARVCR0); /* negate reset of AR LSI (enable) */
612 for (i = 0; i < 0x40d; i++) /* wait for over 420 cycles @ 27MHz */
613 cpu_relax();
614
615 /* AR uses INT3 of CPU as interrupt pin. */
616 ar_outl(ARINTSEL_INT3, ARINTSEL);
617
618 if (ar->size == AR_SIZE_QVGA)
619 cr |= ARVCR1_QVGA;
620 if (ar->mode == AR_MODE_NORMAL)
621 cr |= ARVCR1_NORMAL;
622 ar_outl(cr, ARVCR1);
623
624 /*
625 * Initialize IIC so that CPU can communicate with AR LSI,
626 * and send boot commands to AR LSI.
627 */
628 init_iic();
629
630 for (i = 0; i < 0x100000; i++) { /* > 0xa1d10, 56ms */
631 if ((ar_inl(ARVCR0) & ARVCR0_VDS)) { /* VSYNC */
632 found = 1;
633 break;
634 }
635 }
636
637 if (found == 0)
638 return -ENODEV;
639
640 v4l2_info(&ar->v4l2_dev, "Initializing ");
641
642 iic(2, 0x78, 0x11, 0x01, 0x00); /* start */
643 iic(3, 0x78, 0x12, 0x00, 0x06);
644 iic(3, 0x78, 0x12, 0x12, 0x30);
645 iic(3, 0x78, 0x12, 0x15, 0x58);
646 iic(3, 0x78, 0x12, 0x17, 0x30);
647 printk(KERN_CONT ".");
648 iic(3, 0x78, 0x12, 0x1a, 0x97);
649 iic(3, 0x78, 0x12, 0x1b, 0xff);
650 iic(3, 0x78, 0x12, 0x1c, 0xff);
651 iic(3, 0x78, 0x12, 0x26, 0x10);
652 iic(3, 0x78, 0x12, 0x27, 0x00);
653 printk(KERN_CONT ".");
654 iic(2, 0x78, 0x34, 0x02, 0x00);
655 iic(2, 0x78, 0x7a, 0x10, 0x00);
656 iic(2, 0x78, 0x80, 0x39, 0x00);
657 iic(2, 0x78, 0x81, 0xe6, 0x00);
658 iic(2, 0x78, 0x8d, 0x00, 0x00);
659 printk(KERN_CONT ".");
660 iic(2, 0x78, 0x8e, 0x0c, 0x00);
661 iic(2, 0x78, 0x8f, 0x00, 0x00);
662 #if 0
663 iic(2, 0x78, 0x90, 0x00, 0x00); /* AWB on=1 off=0 */
664 #endif
665 iic(2, 0x78, 0x93, 0x01, 0x00);
666 iic(2, 0x78, 0x94, 0xcd, 0x00);
667 iic(2, 0x78, 0x95, 0x00, 0x00);
668 printk(KERN_CONT ".");
669 iic(2, 0x78, 0x96, 0xa0, 0x00);
670 iic(2, 0x78, 0x97, 0x00, 0x00);
671 iic(2, 0x78, 0x98, 0x60, 0x00);
672 iic(2, 0x78, 0x99, 0x01, 0x00);
673 iic(2, 0x78, 0x9a, 0x19, 0x00);
674 printk(KERN_CONT ".");
675 iic(2, 0x78, 0x9b, 0x02, 0x00);
676 iic(2, 0x78, 0x9c, 0xe8, 0x00);
677 iic(2, 0x78, 0x9d, 0x02, 0x00);
678 iic(2, 0x78, 0x9e, 0x2e, 0x00);
679 iic(2, 0x78, 0xb8, 0x78, 0x00);
680 iic(2, 0x78, 0xba, 0x05, 0x00);
681 #if 0
682 iic(2, 0x78, 0x83, 0x8c, 0x00); /* brightness */
683 #endif
684 printk(KERN_CONT ".");
685
686 /* color correction */
687 iic(3, 0x78, 0x49, 0x00, 0x95); /* a */
688 iic(3, 0x78, 0x49, 0x01, 0x96); /* b */
689 iic(3, 0x78, 0x49, 0x03, 0x85); /* c */
690 iic(3, 0x78, 0x49, 0x04, 0x97); /* d */
691 iic(3, 0x78, 0x49, 0x02, 0x7e); /* e(Lo) */
692 iic(3, 0x78, 0x49, 0x05, 0xa4); /* f(Lo) */
693 iic(3, 0x78, 0x49, 0x06, 0x04); /* e(Hi) */
694 iic(3, 0x78, 0x49, 0x07, 0x04); /* e(Hi) */
695 iic(2, 0x78, 0x48, 0x01, 0x00); /* on=1 off=0 */
696
697 printk(KERN_CONT ".");
698 iic(2, 0x78, 0x11, 0x00, 0x00); /* end */
699 printk(KERN_CONT " done\n");
700 return 0;
701 }
702
703
704 /****************************************************************************
705 *
706 * Video4Linux Module functions
707 *
708 ****************************************************************************/
709
710 static const struct v4l2_file_operations ar_fops = {
711 .owner = THIS_MODULE,
712 .read = ar_read,
713 .unlocked_ioctl = video_ioctl2,
714 };
715
716 static const struct v4l2_ioctl_ops ar_ioctl_ops = {
717 .vidioc_querycap = ar_querycap,
718 .vidioc_g_input = ar_g_input,
719 .vidioc_s_input = ar_s_input,
720 .vidioc_enum_input = ar_enum_input,
721 .vidioc_enum_fmt_vid_cap = ar_enum_fmt_vid_cap,
722 .vidioc_g_fmt_vid_cap = ar_g_fmt_vid_cap,
723 .vidioc_s_fmt_vid_cap = ar_s_fmt_vid_cap,
724 .vidioc_try_fmt_vid_cap = ar_try_fmt_vid_cap,
725 };
726
727 #define ALIGN4(x) ((((int)(x)) & 0x3) == 0)
728
729 static int __init ar_init(void)
730 {
731 struct ar *ar;
732 struct v4l2_device *v4l2_dev;
733 int ret;
734 int i;
735
736 ar = &ardev;
737 v4l2_dev = &ar->v4l2_dev;
738 strlcpy(v4l2_dev->name, "arv", sizeof(v4l2_dev->name));
739 v4l2_info(v4l2_dev, "Colour AR VGA driver %s\n", VERSION);
740
741 ret = v4l2_device_register(NULL, v4l2_dev);
742 if (ret < 0) {
743 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
744 return ret;
745 }
746 ret = -EIO;
747
748 #if USE_INT
749 /* allocate a DMA buffer for 1 line. */
750 ar->line_buff = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL | GFP_DMA);
751 if (ar->line_buff == NULL || !ALIGN4(ar->line_buff)) {
752 v4l2_err(v4l2_dev, "buffer allocation failed for DMA.\n");
753 ret = -ENOMEM;
754 goto out_end;
755 }
756 #endif
757 /* allocate buffers for a frame */
758 for (i = 0; i < MAX_AR_HEIGHT; i++) {
759 ar->frame[i] = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL);
760 if (ar->frame[i] == NULL || !ALIGN4(ar->frame[i])) {
761 v4l2_err(v4l2_dev, "buffer allocation failed for frame.\n");
762 ret = -ENOMEM;
763 goto out_line_buff;
764 }
765 }
766
767 strlcpy(ar->vdev.name, "Colour AR VGA", sizeof(ar->vdev.name));
768 ar->vdev.v4l2_dev = v4l2_dev;
769 ar->vdev.fops = &ar_fops;
770 ar->vdev.ioctl_ops = &ar_ioctl_ops;
771 ar->vdev.release = video_device_release_empty;
772 video_set_drvdata(&ar->vdev, ar);
773
774 if (vga) {
775 ar->width = AR_WIDTH_VGA;
776 ar->height = AR_HEIGHT_VGA;
777 ar->size = AR_SIZE_VGA;
778 ar->frame_bytes = AR_FRAME_BYTES_VGA;
779 ar->line_bytes = AR_LINE_BYTES_VGA;
780 if (vga_interlace)
781 ar->mode = AR_MODE_INTERLACE;
782 else
783 ar->mode = AR_MODE_NORMAL;
784 } else {
785 ar->width = AR_WIDTH_QVGA;
786 ar->height = AR_HEIGHT_QVGA;
787 ar->size = AR_SIZE_QVGA;
788 ar->frame_bytes = AR_FRAME_BYTES_QVGA;
789 ar->line_bytes = AR_LINE_BYTES_QVGA;
790 ar->mode = AR_MODE_INTERLACE;
791 }
792 mutex_init(&ar->lock);
793 init_waitqueue_head(&ar->wait);
794
795 #if USE_INT
796 if (request_irq(M32R_IRQ_INT3, ar_interrupt, 0, "arv", ar)) {
797 v4l2_err("request_irq(%d) failed.\n", M32R_IRQ_INT3);
798 ret = -EIO;
799 goto out_irq;
800 }
801 #endif
802
803 if (ar_initialize(ar) != 0) {
804 v4l2_err(v4l2_dev, "M64278 not found.\n");
805 ret = -ENODEV;
806 goto out_dev;
807 }
808
809 /*
810 * ok, we can initialize h/w according to parameters,
811 * so register video device as a frame grabber type.
812 * device is named "video[0-64]".
813 * video_register_device() initializes h/w using ar_initialize().
814 */
815 if (video_register_device(&ar->vdev, VFL_TYPE_GRABBER, video_nr) != 0) {
816 /* return -1, -ENFILE(full) or others */
817 v4l2_err(v4l2_dev, "register video (Colour AR) failed.\n");
818 ret = -ENODEV;
819 goto out_dev;
820 }
821
822 v4l2_info(v4l2_dev, "%s: Found M64278 VGA (IRQ %d, Freq %dMHz).\n",
823 video_device_node_name(&ar->vdev), M32R_IRQ_INT3, freq);
824
825 return 0;
826
827 out_dev:
828 #if USE_INT
829 free_irq(M32R_IRQ_INT3, ar);
830
831 out_irq:
832 #endif
833 for (i = 0; i < MAX_AR_HEIGHT; i++)
834 kfree(ar->frame[i]);
835
836 out_line_buff:
837 #if USE_INT
838 kfree(ar->line_buff);
839
840 out_end:
841 #endif
842 v4l2_device_unregister(&ar->v4l2_dev);
843 return ret;
844 }
845
846
847 static int __init ar_init_module(void)
848 {
849 freq = (boot_cpu_data.bus_clock / 1000000);
850 printk(KERN_INFO "arv: Bus clock %d\n", freq);
851 if (freq != 50 && freq != 75)
852 freq = DEFAULT_FREQ;
853 return ar_init();
854 }
855
856 static void __exit ar_cleanup_module(void)
857 {
858 struct ar *ar;
859 int i;
860
861 ar = &ardev;
862 video_unregister_device(&ar->vdev);
863 #if USE_INT
864 free_irq(M32R_IRQ_INT3, ar);
865 #endif
866 for (i = 0; i < MAX_AR_HEIGHT; i++)
867 kfree(ar->frame[i]);
868 #if USE_INT
869 kfree(ar->line_buff);
870 #endif
871 v4l2_device_unregister(&ar->v4l2_dev);
872 }
873
874 module_init(ar_init_module);
875 module_exit(ar_cleanup_module);
876
877 MODULE_AUTHOR("Takeo Takahashi <takahashi.takeo@renesas.com>");
878 MODULE_DESCRIPTION("Colour AR M64278(VGA) for Video4Linux");
879 MODULE_LICENSE("GPL");
880 MODULE_VERSION(VERSION);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree