summaryrefslogtreecommitdiff
path: root/drivers/staging/go7007/saa7134-go7007.c
blob: b25d7d2090e171981e49c470261de1b2583d6e2f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
/*
 * Copyright (C) 2005-2006 Micronas USA Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (Version 2) as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include <asm/byteorder.h>
#include <media/v4l2-common.h>

#include "saa7134-reg.h"
#include "saa7134.h"
#include "go7007-priv.h"

#define GO7007_HPI_DEBUG

enum hpi_address {
	HPI_ADDR_VIDEO_BUFFER = 0xe4,
	HPI_ADDR_INIT_BUFFER = 0xea,
	HPI_ADDR_INTR_RET_VALUE = 0xee,
	HPI_ADDR_INTR_RET_DATA = 0xec,
	HPI_ADDR_INTR_STATUS = 0xf4,
	HPI_ADDR_INTR_WR_PARAM = 0xf6,
	HPI_ADDR_INTR_WR_INDEX = 0xf8,
};

enum gpio_command {
	GPIO_COMMAND_RESET = 0x00, /* 000b */
	GPIO_COMMAND_REQ1  = 0x04, /* 001b */
	GPIO_COMMAND_WRITE = 0x20, /* 010b */
	GPIO_COMMAND_REQ2  = 0x24, /* 011b */
	GPIO_COMMAND_READ  = 0x80, /* 100b */
	GPIO_COMMAND_VIDEO = 0x84, /* 101b */
	GPIO_COMMAND_IDLE  = 0xA0, /* 110b */
	GPIO_COMMAND_ADDR  = 0xA4, /* 111b */
};

struct saa7134_go7007 {
	struct saa7134_dev *dev;
	u8 *top;
	u8 *bottom;
	dma_addr_t top_dma;
	dma_addr_t bottom_dma;
};

static struct go7007_board_info board_voyager = {
	.firmware	 = "go7007tv.bin",
	.flags		 = 0,
	.sensor_flags	 = GO7007_SENSOR_656 |
				GO7007_SENSOR_VALID_ENABLE |
				GO7007_SENSOR_TV |
				GO7007_SENSOR_VBI,
	.audio_flags	= GO7007_AUDIO_I2S_MODE_1 |
				GO7007_AUDIO_WORD_16,
	.audio_rate	 = 48000,
	.audio_bclk_div	 = 8,
	.audio_main_div	 = 2,
	.hpi_buffer_cap  = 7,
	.num_inputs	 = 1,
	.inputs 	 = {
		{
			.name		= "SAA7134",
		},
	},
};
MODULE_FIRMWARE("go7007tv.bin");

/********************* Driver for GPIO HPI interface *********************/

static int gpio_write(struct saa7134_dev *dev, u8 addr, u16 data)
{
	saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);

	/* Write HPI address */
	saa_writeb(SAA7134_GPIO_GPSTATUS0, addr);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_ADDR);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);

	/* Write low byte */
	saa_writeb(SAA7134_GPIO_GPSTATUS0, data & 0xff);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_WRITE);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);

	/* Write high byte */
	saa_writeb(SAA7134_GPIO_GPSTATUS0, data >> 8);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_WRITE);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);

	return 0;
}

static int gpio_read(struct saa7134_dev *dev, u8 addr, u16 *data)
{
	saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);

	/* Write HPI address */
	saa_writeb(SAA7134_GPIO_GPSTATUS0, addr);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_ADDR);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);

	saa_writeb(SAA7134_GPIO_GPMODE0, 0x00);

	/* Read low byte */
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_READ);
	saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	*data = saa_readb(SAA7134_GPIO_GPSTATUS0);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);

	/* Read high byte */
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_READ);
	saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	*data |= saa_readb(SAA7134_GPIO_GPSTATUS0) << 8;
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);

	return 0;
}

static int saa7134_go7007_interface_reset(struct go7007 *go)
{
	struct saa7134_go7007 *saa = go->hpi_context;
	struct saa7134_dev *dev = saa->dev;
	u32 status;
	u16 intr_val, intr_data;
	int count = 20;

	saa_clearb(SAA7134_TS_PARALLEL, 0x80); /* Disable TS interface */
	saa_writeb(SAA7134_GPIO_GPMODE2, 0xa4);
	saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);

	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ1);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_RESET);
	msleep(1);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ1);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ2);
	msleep(10);

	saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
	saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

	status = saa_readb(SAA7134_GPIO_GPSTATUS2);
	/*printk(KERN_DEBUG "status is %s\n", status & 0x40 ? "OK" : "not OK"); */

	/* enter command mode...(?) */
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ1);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ2);

	do {
		saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
		saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
		status = saa_readb(SAA7134_GPIO_GPSTATUS2);
		/*printk(KERN_INFO "gpio is %08x\n", saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2)); */
	} while (--count > 0);

	/* Wait for an interrupt to indicate successful hardware reset */
	if (go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
			(intr_val & ~0x1) != 0x55aa) {
		printk(KERN_ERR
			"saa7134-go7007: unable to reset the GO7007\n");
		return -1;
	}
	return 0;
}

static int saa7134_go7007_write_interrupt(struct go7007 *go, int addr, int data)
{
	struct saa7134_go7007 *saa = go->hpi_context;
	struct saa7134_dev *dev = saa->dev;
	int i;
	u16 status_reg;

#ifdef GO7007_HPI_DEBUG
	printk(KERN_DEBUG
		"saa7134-go7007: WriteInterrupt: %04x %04x\n", addr, data);
#endif

	for (i = 0; i < 100; ++i) {
		gpio_read(dev, HPI_ADDR_INTR_STATUS, &status_reg);
		if (!(status_reg & 0x0010))
			break;
		msleep(10);
	}
	if (i == 100) {
		printk(KERN_ERR
			"saa7134-go7007: device is hung, status reg = 0x%04x\n",
			status_reg);
		return -1;
	}
	gpio_write(dev, HPI_ADDR_INTR_WR_PARAM, data);
	gpio_write(dev, HPI_ADDR_INTR_WR_INDEX, addr);

	return 0;
}

static int saa7134_go7007_read_interrupt(struct go7007 *go)
{
	struct saa7134_go7007 *saa = go->hpi_context;
	struct saa7134_dev *dev = saa->dev;

	/* XXX we need to wait if there is no interrupt available */
	go->interrupt_available = 1;
	gpio_read(dev, HPI_ADDR_INTR_RET_VALUE, &go->interrupt_value);
	gpio_read(dev, HPI_ADDR_INTR_RET_DATA, &go->interrupt_data);
#ifdef GO7007_HPI_DEBUG
	printk(KERN_DEBUG "saa7134-go7007: ReadInterrupt: %04x %04x\n",
			go->interrupt_value, go->interrupt_data);
#endif
	return 0;
}

static void saa7134_go7007_irq_ts_done(struct saa7134_dev *dev,
						unsigned long status)
{
	struct go7007 *go = video_get_drvdata(dev->empress_dev);
	struct saa7134_go7007 *saa = go->hpi_context;

	if (!go->streaming)
		return;
	if (0 != (status & 0x000f0000))
		printk(KERN_DEBUG "saa7134-go7007: irq: lost %ld\n",
				(status >> 16) & 0x0f);
	if (status & 0x100000) {
		dma_sync_single(&dev->pci->dev,
				saa->bottom_dma, PAGE_SIZE, DMA_FROM_DEVICE);
		go7007_parse_video_stream(go, saa->bottom, PAGE_SIZE);
		saa_writel(SAA7134_RS_BA2(5), cpu_to_le32(saa->bottom_dma));
	} else {
		dma_sync_single(&dev->pci->dev,
				saa->top_dma, PAGE_SIZE, DMA_FROM_DEVICE);
		go7007_parse_video_stream(go, saa->top, PAGE_SIZE);
		saa_writel(SAA7134_RS_BA1(5), cpu_to_le32(saa->top_dma));
	}
}

static int saa7134_go7007_stream_start(struct go7007 *go)
{
	struct saa7134_go7007 *saa = go->hpi_context;
	struct saa7134_dev *dev = saa->dev;

	saa->top_dma = dma_map_page(&dev->pci->dev, virt_to_page(saa->top),
			0, PAGE_SIZE, DMA_FROM_DEVICE);
	if (!saa->top_dma)
		return -ENOMEM;
	saa->bottom_dma = dma_map_page(&dev->pci->dev,
			virt_to_page(saa->bottom),
			0, PAGE_SIZE, DMA_FROM_DEVICE);
	if (!saa->bottom_dma) {
		dma_unmap_page(&dev->pci->dev, saa->top_dma, PAGE_SIZE,
				DMA_FROM_DEVICE);
		return -ENOMEM;
	}

	saa_writel(SAA7134_VIDEO_PORT_CTRL0 >> 2, 0xA300B000);
	saa_writel(SAA7134_VIDEO_PORT_CTRL4 >> 2, 0x40000200);

	/* Set HPI interface for video */
	saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);
	saa_writeb(SAA7134_GPIO_GPSTATUS0, HPI_ADDR_VIDEO_BUFFER);
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_ADDR);
	saa_writeb(SAA7134_GPIO_GPMODE0, 0x00);

	/* Enable TS interface */
	saa_writeb(SAA7134_TS_PARALLEL, 0xe6);

	/* Reset TS interface */
	saa_setb(SAA7134_TS_SERIAL1, 0x01);
	saa_clearb(SAA7134_TS_SERIAL1, 0x01);

	/* Set up transfer block size */
	saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 128 - 1);
	saa_writeb(SAA7134_TS_DMA0, (PAGE_SIZE >> 7) - 1);
	saa_writeb(SAA7134_TS_DMA1, 0);
	saa_writeb(SAA7134_TS_DMA2, 0);

	/* Enable video streaming mode */
	saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_VIDEO);

	saa_writel(SAA7134_RS_BA1(5), cpu_to_le32(saa->top_dma));
	saa_writel(SAA7134_RS_BA2(5), cpu_to_le32(saa->bottom_dma));
	saa_writel(SAA7134_RS_PITCH(5), 128);
	saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_MAX);

	/* Enable TS FIFO */
	saa_setl(SAA7134_MAIN_CTRL, SAA7134_MAIN_CTRL_TE5);

	/* Enable DMA IRQ */
	saa_setl(SAA7134_IRQ1,
			SAA7134_IRQ1_INTE_RA2_1 | SAA7134_IRQ1_INTE_RA2_0);

	return 0;
}

static int saa7134_go7007_stream_stop(struct go7007 *go)
{
	struct saa7134_go7007 *saa = go->hpi_context;
	struct saa7134_dev *dev;

	if (!saa)
		return -EINVAL;
	dev = saa->dev;
	if (!dev)
		return -EINVAL;

	/* Shut down TS FIFO */
	saa_clearl(SAA7134_MAIN_CTRL, SAA7134_MAIN_CTRL_TE5);

	/* Disable DMA IRQ */
	saa_clearl(SAA7134_IRQ1,
			SAA7134_IRQ1_INTE_RA2_1 | SAA7134_IRQ1_INTE_RA2_0);

	/* Disable TS interface */
	saa_clearb(SAA7134_TS_PARALLEL, 0x80);

	dma_unmap_page(&dev->pci->dev, saa->top_dma, PAGE_SIZE,
			DMA_FROM_DEVICE);
	dma_unmap_page(&dev->pci->dev, saa->bottom_dma, PAGE_SIZE,
			DMA_FROM_DEVICE);

	return 0;
}

static int saa7134_go7007_send_firmware(struct go7007 *go, u8 *data, int len)
{
	struct saa7134_go7007 *saa = go->hpi_context;
	struct saa7134_dev *dev = saa->dev;
	u16 status_reg;
	int i;

#ifdef GO7007_HPI_DEBUG
	printk(KERN_DEBUG "saa7134-go7007: DownloadBuffer "
			"sending %d bytes\n", len);
#endif

	while (len > 0) {
		i = len > 64 ? 64 : len;
		saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);
		saa_writeb(SAA7134_GPIO_GPSTATUS0, HPI_ADDR_INIT_BUFFER);
		saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_ADDR);
		saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
		while (i-- > 0) {
			saa_writeb(SAA7134_GPIO_GPSTATUS0, *data);
			saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_WRITE);
			saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
			++data;
			--len;
		}
		for (i = 0; i < 100; ++i) {
			gpio_read(dev, HPI_ADDR_INTR_STATUS, &status_reg);
			if (!(status_reg & 0x0002))
				break;
		}
		if (i == 100) {
			printk(KERN_ERR "saa7134-go7007: device is hung, "
					"status reg = 0x%04x\n", status_reg);
			return -1;
		}
	}
	return 0;
}

static int saa7134_go7007_send_command(struct go7007 *go, unsigned int cmd,
					void *arg)
{
	struct saa7134_go7007 *saa = go->hpi_context;
	struct saa7134_dev *dev = saa->dev;

	switch (cmd) {
	case VIDIOC_S_STD:
	{
		v4l2_std_id *std = arg;
		return saa7134_s_std_internal(dev, NULL, std);
	}
	case VIDIOC_G_STD:
	{
		v4l2_std_id *std = arg;
		*std = dev->tvnorm->id;
		return 0;
	}
	case VIDIOC_QUERYCTRL:
	{
		struct v4l2_queryctrl *ctrl = arg;
		if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_USER)
			return saa7134_queryctrl(NULL, NULL, ctrl);
	}
	case VIDIOC_G_CTRL:
	{
		struct v4l2_control *ctrl = arg;
		if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_USER)
			return saa7134_g_ctrl_internal(dev, NULL, ctrl);
	}
	case VIDIOC_S_CTRL:
	{
		struct v4l2_control *ctrl = arg;
		if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_USER)
			return saa7134_s_ctrl_internal(dev, NULL, ctrl);
	}
	}
	return -EINVAL;

}

static struct go7007_hpi_ops saa7134_go7007_hpi_ops = {
	.interface_reset	= saa7134_go7007_interface_reset,
	.write_interrupt	= saa7134_go7007_write_interrupt,
	.read_interrupt		= saa7134_go7007_read_interrupt,
	.stream_start		= saa7134_go7007_stream_start,
	.stream_stop		= saa7134_go7007_stream_stop,
	.send_firmware		= saa7134_go7007_send_firmware,
	.send_command		= saa7134_go7007_send_command,
};

/********************* Add/remove functions *********************/

static int saa7134_go7007_init(struct saa7134_dev *dev)
{
	struct go7007 *go;
	struct saa7134_go7007 *saa;

	printk(KERN_DEBUG "saa7134-go7007: probing new SAA713X board\n");

	saa = kmalloc(sizeof(struct saa7134_go7007), GFP_KERNEL);
	if (saa == NULL)
		return -ENOMEM;
	memset(saa, 0, sizeof(struct saa7134_go7007));

	/* Allocate a couple pages for receiving the compressed stream */
	saa->top = (u8 *)get_zeroed_page(GFP_KERNEL);
	if (!saa->top)
		goto allocfail;
	saa->bottom = (u8 *)get_zeroed_page(GFP_KERNEL);
	if (!saa->bottom)
		goto allocfail;

	go = go7007_alloc(&board_voyager, &dev->pci->dev);
	if (go == NULL)
		goto allocfail;
	go->board_id = GO7007_BOARDID_PCI_VOYAGER;
	strncpy(go->name, saa7134_boards[dev->board].name, sizeof(go->name));
	go->hpi_ops = &saa7134_go7007_hpi_ops;
	go->hpi_context = saa;
	saa->dev = dev;

	/* Boot the GO7007 */
	if (go7007_boot_encoder(go, go->board_info->flags &
					GO7007_BOARD_USE_ONBOARD_I2C) < 0)
		goto initfail;

	/* Do any final GO7007 initialization, then register the
	 * V4L2 and ALSA interfaces */
	if (go7007_register_encoder(go) < 0)
		goto initfail;
	dev->empress_dev = go->video_dev;
	video_set_drvdata(dev->empress_dev, go);

	go->status = STATUS_ONLINE;
	return 0;

initfail:
	go->status = STATUS_SHUTDOWN;
	return 0;

allocfail:
	if (saa->top)
		free_page((unsigned long)saa->top);
	if (saa->bottom)
		free_page((unsigned long)saa->bottom);
	kfree(saa);
	return -ENOMEM;
}

static int saa7134_go7007_fini(struct saa7134_dev *dev)
{
	struct go7007 *go;
	struct saa7134_go7007 *saa;

	if (NULL == dev->empress_dev)
		return 0;

	go = video_get_drvdata(dev->empress_dev);
	saa = go->hpi_context;
	go->status = STATUS_SHUTDOWN;
	free_page((unsigned long)saa->top);
	free_page((unsigned long)saa->bottom);
	kfree(saa);
	go7007_remove(go);
	dev->empress_dev = NULL;

	return 0;
}

static struct saa7134_mpeg_ops saa7134_go7007_ops = {
	.type          = SAA7134_MPEG_GO7007,
	.init          = saa7134_go7007_init,
	.fini          = saa7134_go7007_fini,
	.irq_ts_done   = saa7134_go7007_irq_ts_done,
};

static int __init saa7134_go7007_mod_init(void)
{
	return saa7134_ts_register(&saa7134_go7007_ops);
}

static void __exit saa7134_go7007_mod_cleanup(void)
{
	saa7134_ts_unregister(&saa7134_go7007_ops);
}

module_init(saa7134_go7007_mod_init);
module_exit(saa7134_go7007_mod_cleanup);

MODULE_LICENSE("GPL v2");