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/drivers/staging/go7007/go7007-driver.c

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C | 659 lines | 516 code | 44 blank | 99 comment | 101 complexity | e8c5e1cb08f060b36abea21bba940664 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  1/*
  2 * Copyright (C) 2005-2006 Micronas USA Inc.
  3 *
  4 * This program is free software; you can redistribute it and/or modify
  5 * it under the terms of the GNU General Public License (Version 2) as
  6 * published by the Free Software Foundation.
  7 *
  8 * This program is distributed in the hope that it will be useful,
  9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 11 * GNU General Public License for more details.
 12 *
 13 * You should have received a copy of the GNU General Public License
 14 * along with this program; if not, write to the Free Software Foundation,
 15 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 16 */
 17
 18#include <linux/module.h>
 19#include <linux/init.h>
 20#include <linux/delay.h>
 21#include <linux/sched.h>
 22#include <linux/spinlock.h>
 23#include <linux/unistd.h>
 24#include <linux/time.h>
 25#include <linux/mm.h>
 26#include <linux/vmalloc.h>
 27#include <linux/device.h>
 28#include <linux/i2c.h>
 29#include <linux/firmware.h>
 30#include <linux/mutex.h>
 31#include <linux/uaccess.h>
 32#include <linux/slab.h>
 33#include <asm/system.h>
 34#include <linux/videodev2.h>
 35#include <media/tuner.h>
 36#include <media/v4l2-common.h>
 37
 38#include "go7007-priv.h"
 39#include "wis-i2c.h"
 40
 41/*
 42 * Wait for an interrupt to be delivered from the GO7007SB and return
 43 * the associated value and data.
 44 *
 45 * Must be called with the hw_lock held.
 46 */
 47int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
 48{
 49	go->interrupt_available = 0;
 50	go->hpi_ops->read_interrupt(go);
 51	if (wait_event_timeout(go->interrupt_waitq,
 52				go->interrupt_available, 5*HZ) < 0) {
 53		v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n");
 54		return -1;
 55	}
 56	if (!go->interrupt_available)
 57		return -1;
 58	go->interrupt_available = 0;
 59	*value = go->interrupt_value & 0xfffe;
 60	*data = go->interrupt_data;
 61	return 0;
 62}
 63EXPORT_SYMBOL(go7007_read_interrupt);
 64
 65/*
 66 * Read a register/address on the GO7007SB.
 67 *
 68 * Must be called with the hw_lock held.
 69 */
 70int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
 71{
 72	int count = 100;
 73	u16 value;
 74
 75	if (go7007_write_interrupt(go, 0x0010, addr) < 0)
 76		return -EIO;
 77	while (count-- > 0) {
 78		if (go7007_read_interrupt(go, &value, data) == 0 &&
 79				value == 0xa000)
 80			return 0;
 81	}
 82	return -EIO;
 83}
 84EXPORT_SYMBOL(go7007_read_addr);
 85
 86/*
 87 * Send the boot firmware to the encoder, which just wakes it up and lets
 88 * us talk to the GPIO pins and on-board I2C adapter.
 89 *
 90 * Must be called with the hw_lock held.
 91 */
 92static int go7007_load_encoder(struct go7007 *go)
 93{
 94	const struct firmware *fw_entry;
 95	char fw_name[] = "go7007fw.bin";
 96	void *bounce;
 97	int fw_len, rv = 0;
 98	u16 intr_val, intr_data;
 99
100	if (request_firmware(&fw_entry, fw_name, go->dev)) {
101		v4l2_err(go, "unable to load firmware from file "
102			"\"%s\"\n", fw_name);
103		return -1;
104	}
105	if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
106		v4l2_err(go, "file \"%s\" does not appear to be "
107				"go7007 firmware\n", fw_name);
108		release_firmware(fw_entry);
109		return -1;
110	}
111	fw_len = fw_entry->size - 16;
112	bounce = kmalloc(fw_len, GFP_KERNEL);
113	if (bounce == NULL) {
114		v4l2_err(go, "unable to allocate %d bytes for "
115				"firmware transfer\n", fw_len);
116		release_firmware(fw_entry);
117		return -1;
118	}
119	memcpy(bounce, fw_entry->data + 16, fw_len);
120	release_firmware(fw_entry);
121	if (go7007_interface_reset(go) < 0 ||
122			go7007_send_firmware(go, bounce, fw_len) < 0 ||
123			go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
124			(intr_val & ~0x1) != 0x5a5a) {
125		v4l2_err(go, "error transferring firmware\n");
126		rv = -1;
127	}
128	kfree(bounce);
129	return rv;
130}
131
132MODULE_FIRMWARE("go7007fw.bin");
133
134/*
135 * Boot the encoder and register the I2C adapter if requested.  Do the
136 * minimum initialization necessary, since the board-specific code may
137 * still need to probe the board ID.
138 *
139 * Must NOT be called with the hw_lock held.
140 */
141int go7007_boot_encoder(struct go7007 *go, int init_i2c)
142{
143	int ret;
144
145	mutex_lock(&go->hw_lock);
146	ret = go7007_load_encoder(go);
147	mutex_unlock(&go->hw_lock);
148	if (ret < 0)
149		return -1;
150	if (!init_i2c)
151		return 0;
152	if (go7007_i2c_init(go) < 0)
153		return -1;
154	go->i2c_adapter_online = 1;
155	return 0;
156}
157EXPORT_SYMBOL(go7007_boot_encoder);
158
159/*
160 * Configure any hardware-related registers in the GO7007, such as GPIO
161 * pins and bus parameters, which are board-specific.  This assumes
162 * the boot firmware has already been downloaded.
163 *
164 * Must be called with the hw_lock held.
165 */
166static int go7007_init_encoder(struct go7007 *go)
167{
168	if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
169		go7007_write_addr(go, 0x1000, 0x0811);
170		go7007_write_addr(go, 0x1000, 0x0c11);
171	}
172	if (go->board_id == GO7007_BOARDID_MATRIX_REV) {
173		/* Set GPIO pin 0 to be an output (audio clock control) */
174		go7007_write_addr(go, 0x3c82, 0x0001);
175		go7007_write_addr(go, 0x3c80, 0x00fe);
176	}
177	return 0;
178}
179
180/*
181 * Send the boot firmware to the GO7007 and configure the registers.  This
182 * is the only way to stop the encoder once it has started streaming video.
183 *
184 * Must be called with the hw_lock held.
185 */
186int go7007_reset_encoder(struct go7007 *go)
187{
188	if (go7007_load_encoder(go) < 0)
189		return -1;
190	return go7007_init_encoder(go);
191}
192
193/*
194 * Attempt to instantiate an I2C client by ID, probably loading a module.
195 */
196static int init_i2c_module(struct i2c_adapter *adapter, const char *type,
197			   int addr)
198{
199	struct go7007 *go = i2c_get_adapdata(adapter);
200	struct v4l2_device *v4l2_dev = &go->v4l2_dev;
201
202	if (v4l2_i2c_new_subdev(v4l2_dev, adapter, type, addr, NULL))
203		return 0;
204
205	printk(KERN_INFO "go7007: probing for module i2c:%s failed\n", type);
206	return -1;
207}
208
209/*
210 * Finalize the GO7007 hardware setup, register the on-board I2C adapter
211 * (if used on this board), load the I2C client driver for the sensor
212 * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
213 * interfaces.
214 *
215 * Must NOT be called with the hw_lock held.
216 */
217int go7007_register_encoder(struct go7007 *go)
218{
219	int i, ret;
220
221	printk(KERN_INFO "go7007: registering new %s\n", go->name);
222
223	mutex_lock(&go->hw_lock);
224	ret = go7007_init_encoder(go);
225	mutex_unlock(&go->hw_lock);
226	if (ret < 0)
227		return -1;
228
229	/* v4l2 init must happen before i2c subdevs */
230	ret = go7007_v4l2_init(go);
231	if (ret < 0)
232		return ret;
233
234	if (!go->i2c_adapter_online &&
235			go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
236		if (go7007_i2c_init(go) < 0)
237			return -1;
238		go->i2c_adapter_online = 1;
239	}
240	if (go->i2c_adapter_online) {
241		for (i = 0; i < go->board_info->num_i2c_devs; ++i)
242			init_i2c_module(&go->i2c_adapter,
243					go->board_info->i2c_devs[i].type,
244					go->board_info->i2c_devs[i].addr);
245		if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
246			i2c_clients_command(&go->i2c_adapter,
247				DECODER_SET_CHANNEL, &go->channel_number);
248	}
249	if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
250		go->audio_enabled = 1;
251		go7007_snd_init(go);
252	}
253	return 0;
254}
255EXPORT_SYMBOL(go7007_register_encoder);
256
257/*
258 * Send the encode firmware to the encoder, which will cause it
259 * to immediately start delivering the video and audio streams.
260 *
261 * Must be called with the hw_lock held.
262 */
263int go7007_start_encoder(struct go7007 *go)
264{
265	u8 *fw;
266	int fw_len, rv = 0, i;
267	u16 intr_val, intr_data;
268
269	go->modet_enable = 0;
270	if (!go->dvd_mode)
271		for (i = 0; i < 4; ++i) {
272			if (go->modet[i].enable) {
273				go->modet_enable = 1;
274				continue;
275			}
276			go->modet[i].pixel_threshold = 32767;
277			go->modet[i].motion_threshold = 32767;
278			go->modet[i].mb_threshold = 32767;
279		}
280
281	if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
282		return -1;
283
284	if (go7007_send_firmware(go, fw, fw_len) < 0 ||
285			go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
286		v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
287		rv = -1;
288		goto start_error;
289	}
290
291	go->state = STATE_DATA;
292	go->parse_length = 0;
293	go->seen_frame = 0;
294	if (go7007_stream_start(go) < 0) {
295		v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
296		rv = -1;
297		goto start_error;
298	}
299
300start_error:
301	kfree(fw);
302	return rv;
303}
304
305/*
306 * Store a byte in the current video buffer, if there is one.
307 */
308static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
309{
310	if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
311		unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
312		unsigned int pgoff = gobuf->offset & ~PAGE_MASK;
313
314		*((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
315		++gobuf->offset;
316		++gobuf->bytesused;
317	}
318}
319
320/*
321 * Deliver the last video buffer and get a new one to start writing to.
322 */
323static void frame_boundary(struct go7007 *go)
324{
325	struct go7007_buffer *gobuf;
326	int i;
327
328	if (go->active_buf) {
329		if (go->active_buf->modet_active) {
330			if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
331				for (i = 0; i < 216; ++i)
332					store_byte(go->active_buf,
333							go->active_map[i]);
334				go->active_buf->bytesused -= 216;
335			} else
336				go->active_buf->modet_active = 0;
337		}
338		go->active_buf->state = BUF_STATE_DONE;
339		wake_up_interruptible(&go->frame_waitq);
340		go->active_buf = NULL;
341	}
342	list_for_each_entry(gobuf, &go->stream, stream)
343		if (gobuf->state == BUF_STATE_QUEUED) {
344			gobuf->seq = go->next_seq;
345			do_gettimeofday(&gobuf->timestamp);
346			go->active_buf = gobuf;
347			break;
348		}
349	++go->next_seq;
350}
351
352static void write_bitmap_word(struct go7007 *go)
353{
354	int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
355
356	for (i = 0; i < 16; ++i) {
357		y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
358		x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
359		if (stride * y + (x >> 3) < sizeof(go->active_map))
360			go->active_map[stride * y + (x >> 3)] |=
361					(go->modet_word & 1) << (x & 0x7);
362		go->modet_word >>= 1;
363	}
364}
365
366/*
367 * Parse a chunk of the video stream into frames.  The frames are not
368 * delimited by the hardware, so we have to parse the frame boundaries
369 * based on the type of video stream we're receiving.
370 */
371void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
372{
373	int i, seq_start_code = -1, frame_start_code = -1;
374
375	spin_lock(&go->spinlock);
376
377	switch (go->format) {
378	case GO7007_FORMAT_MPEG4:
379		seq_start_code = 0xB0;
380		frame_start_code = 0xB6;
381		break;
382	case GO7007_FORMAT_MPEG1:
383	case GO7007_FORMAT_MPEG2:
384		seq_start_code = 0xB3;
385		frame_start_code = 0x00;
386		break;
387	}
388
389	for (i = 0; i < length; ++i) {
390		if (go->active_buf != NULL &&
391			    go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
392			v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
393			go->active_buf->offset -= go->active_buf->bytesused;
394			go->active_buf->bytesused = 0;
395			go->active_buf->modet_active = 0;
396			go->active_buf = NULL;
397		}
398
399		switch (go->state) {
400		case STATE_DATA:
401			switch (buf[i]) {
402			case 0x00:
403				go->state = STATE_00;
404				break;
405			case 0xFF:
406				go->state = STATE_FF;
407				break;
408			default:
409				store_byte(go->active_buf, buf[i]);
410				break;
411			}
412			break;
413		case STATE_00:
414			switch (buf[i]) {
415			case 0x00:
416				go->state = STATE_00_00;
417				break;
418			case 0xFF:
419				store_byte(go->active_buf, 0x00);
420				go->state = STATE_FF;
421				break;
422			default:
423				store_byte(go->active_buf, 0x00);
424				store_byte(go->active_buf, buf[i]);
425				go->state = STATE_DATA;
426				break;
427			}
428			break;
429		case STATE_00_00:
430			switch (buf[i]) {
431			case 0x00:
432				store_byte(go->active_buf, 0x00);
433				/* go->state remains STATE_00_00 */
434				break;
435			case 0x01:
436				go->state = STATE_00_00_01;
437				break;
438			case 0xFF:
439				store_byte(go->active_buf, 0x00);
440				store_byte(go->active_buf, 0x00);
441				go->state = STATE_FF;
442				break;
443			default:
444				store_byte(go->active_buf, 0x00);
445				store_byte(go->active_buf, 0x00);
446				store_byte(go->active_buf, buf[i]);
447				go->state = STATE_DATA;
448				break;
449			}
450			break;
451		case STATE_00_00_01:
452			if (buf[i] == 0xF8 && go->modet_enable == 0) {
453				/* MODET start code, but MODET not enabled */
454				store_byte(go->active_buf, 0x00);
455				store_byte(go->active_buf, 0x00);
456				store_byte(go->active_buf, 0x01);
457				store_byte(go->active_buf, 0xF8);
458				go->state = STATE_DATA;
459				break;
460			}
461			/* If this is the start of a new MPEG frame,
462			 * get a new buffer */
463			if ((go->format == GO7007_FORMAT_MPEG1 ||
464					go->format == GO7007_FORMAT_MPEG2 ||
465					go->format == GO7007_FORMAT_MPEG4) &&
466					(buf[i] == seq_start_code ||
467						buf[i] == 0xB8 || /* GOP code */
468						buf[i] == frame_start_code)) {
469				if (go->active_buf == NULL || go->seen_frame)
470					frame_boundary(go);
471				if (buf[i] == frame_start_code) {
472					if (go->active_buf != NULL)
473						go->active_buf->frame_offset =
474							go->active_buf->offset;
475					go->seen_frame = 1;
476				} else {
477					go->seen_frame = 0;
478				}
479			}
480			/* Handle any special chunk types, or just write the
481			 * start code to the (potentially new) buffer */
482			switch (buf[i]) {
483			case 0xF5: /* timestamp */
484				go->parse_length = 12;
485				go->state = STATE_UNPARSED;
486				break;
487			case 0xF6: /* vbi */
488				go->state = STATE_VBI_LEN_A;
489				break;
490			case 0xF8: /* MD map */
491				go->parse_length = 0;
492				memset(go->active_map, 0,
493						sizeof(go->active_map));
494				go->state = STATE_MODET_MAP;
495				break;
496			case 0xFF: /* Potential JPEG start code */
497				store_byte(go->active_buf, 0x00);
498				store_byte(go->active_buf, 0x00);
499				store_byte(go->active_buf, 0x01);
500				go->state = STATE_FF;
501				break;
502			default:
503				store_byte(go->active_buf, 0x00);
504				store_byte(go->active_buf, 0x00);
505				store_byte(go->active_buf, 0x01);
506				store_byte(go->active_buf, buf[i]);
507				go->state = STATE_DATA;
508				break;
509			}
510			break;
511		case STATE_FF:
512			switch (buf[i]) {
513			case 0x00:
514				store_byte(go->active_buf, 0xFF);
515				go->state = STATE_00;
516				break;
517			case 0xFF:
518				store_byte(go->active_buf, 0xFF);
519				/* go->state remains STATE_FF */
520				break;
521			case 0xD8:
522				if (go->format == GO7007_FORMAT_MJPEG)
523					frame_boundary(go);
524				/* fall through */
525			default:
526				store_byte(go->active_buf, 0xFF);
527				store_byte(go->active_buf, buf[i]);
528				go->state = STATE_DATA;
529				break;
530			}
531			break;
532		case STATE_VBI_LEN_A:
533			go->parse_length = buf[i] << 8;
534			go->state = STATE_VBI_LEN_B;
535			break;
536		case STATE_VBI_LEN_B:
537			go->parse_length |= buf[i];
538			if (go->parse_length > 0)
539				go->state = STATE_UNPARSED;
540			else
541				go->state = STATE_DATA;
542			break;
543		case STATE_MODET_MAP:
544			if (go->parse_length < 204) {
545				if (go->parse_length & 1) {
546					go->modet_word |= buf[i];
547					write_bitmap_word(go);
548				} else
549					go->modet_word = buf[i] << 8;
550			} else if (go->parse_length == 207 && go->active_buf) {
551				go->active_buf->modet_active = buf[i];
552			}
553			if (++go->parse_length == 208)
554				go->state = STATE_DATA;
555			break;
556		case STATE_UNPARSED:
557			if (--go->parse_length == 0)
558				go->state = STATE_DATA;
559			break;
560		}
561	}
562
563	spin_unlock(&go->spinlock);
564}
565EXPORT_SYMBOL(go7007_parse_video_stream);
566
567/*
568 * Allocate a new go7007 struct.  Used by the hardware-specific probe.
569 */
570struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
571{
572	struct go7007 *go;
573	int i;
574
575	go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
576	if (go == NULL)
577		return NULL;
578	go->dev = dev;
579	go->board_info = board;
580	go->board_id = 0;
581	go->tuner_type = -1;
582	go->channel_number = 0;
583	go->name[0] = 0;
584	mutex_init(&go->hw_lock);
585	init_waitqueue_head(&go->frame_waitq);
586	spin_lock_init(&go->spinlock);
587	go->video_dev = NULL;
588	go->ref_count = 0;
589	go->status = STATUS_INIT;
590	memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
591	go->i2c_adapter_online = 0;
592	go->interrupt_available = 0;
593	init_waitqueue_head(&go->interrupt_waitq);
594	go->in_use = 0;
595	go->input = 0;
596	if (board->sensor_flags & GO7007_SENSOR_TV) {
597		go->standard = GO7007_STD_NTSC;
598		go->width = 720;
599		go->height = 480;
600		go->sensor_framerate = 30000;
601	} else {
602		go->standard = GO7007_STD_OTHER;
603		go->width = board->sensor_width;
604		go->height = board->sensor_height;
605		go->sensor_framerate = board->sensor_framerate;
606	}
607	go->encoder_v_offset = board->sensor_v_offset;
608	go->encoder_h_offset = board->sensor_h_offset;
609	go->encoder_h_halve = 0;
610	go->encoder_v_halve = 0;
611	go->encoder_subsample = 0;
612	go->streaming = 0;
613	go->format = GO7007_FORMAT_MJPEG;
614	go->bitrate = 1500000;
615	go->fps_scale = 1;
616	go->pali = 0;
617	go->aspect_ratio = GO7007_RATIO_1_1;
618	go->gop_size = 0;
619	go->ipb = 0;
620	go->closed_gop = 0;
621	go->repeat_seqhead = 0;
622	go->seq_header_enable = 0;
623	go->gop_header_enable = 0;
624	go->dvd_mode = 0;
625	go->interlace_coding = 0;
626	for (i = 0; i < 4; ++i)
627		go->modet[i].enable = 0;
628	for (i = 0; i < 1624; ++i)
629		go->modet_map[i] = 0;
630	go->audio_deliver = NULL;
631	go->audio_enabled = 0;
632	INIT_LIST_HEAD(&go->stream);
633
634	return go;
635}
636EXPORT_SYMBOL(go7007_alloc);
637
638/*
639 * Detach and unregister the encoder.  The go7007 struct won't be freed
640 * until v4l2 finishes releasing its resources and all associated fds are
641 * closed by applications.
642 */
643void go7007_remove(struct go7007 *go)
644{
645	if (go->i2c_adapter_online) {
646		if (i2c_del_adapter(&go->i2c_adapter) == 0)
647			go->i2c_adapter_online = 0;
648		else
649			v4l2_err(&go->v4l2_dev,
650				"error removing I2C adapter!\n");
651	}
652
653	if (go->audio_enabled)
654		go7007_snd_remove(go);
655	go7007_v4l2_remove(go);
656}
657EXPORT_SYMBOL(go7007_remove);
658
659MODULE_LICENSE("GPL v2");