summaryrefslogtreecommitdiff
path: root/drivers/media/pci/ttpci/av7110_ca.c
blob: 9fc1dd0ba4c35fc1d6030fb17dc90fbe75d5d849 (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
/*
 * av7110_ca.c: CA and CI stuff
 *
 * Copyright (C) 1999-2002 Ralph  Metzler
 *                       & Marcus Metzler for convergence integrated media GmbH
 *
 * originally based on code by:
 * Copyright (C) 1998,1999 Christian Theiss <mistert@rz.fh-augsburg.de>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 *
 * 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.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 *
 *
 * the project's page is at http://www.linuxtv.org/ 
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/timer.h>
#include <linux/poll.h>
#include <linux/gfp.h>

#include "av7110.h"
#include "av7110_hw.h"
#include "av7110_ca.h"


void CI_handle(struct av7110 *av7110, u8 *data, u16 len)
{
	dprintk(8, "av7110:%p\n",av7110);

	if (len < 3)
		return;
	switch (data[0]) {
	case CI_MSG_CI_INFO:
		if (data[2] != 1 && data[2] != 2)
			break;
		switch (data[1]) {
		case 0:
			av7110->ci_slot[data[2] - 1].flags = 0;
			break;
		case 1:
			av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_PRESENT;
			break;
		case 2:
			av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_READY;
			break;
		}
		break;
	case CI_SWITCH_PRG_REPLY:
		//av7110->ci_stat=data[1];
		break;
	default:
		break;
	}
}


void ci_get_data(struct dvb_ringbuffer *cibuf, u8 *data, int len)
{
	if (dvb_ringbuffer_free(cibuf) < len + 2)
		return;

	DVB_RINGBUFFER_WRITE_BYTE(cibuf, len >> 8);
	DVB_RINGBUFFER_WRITE_BYTE(cibuf, len & 0xff);
	dvb_ringbuffer_write(cibuf, data, len);
	wake_up_interruptible(&cibuf->queue);
}


/******************************************************************************
 * CI link layer file ops
 ******************************************************************************/

static int ci_ll_init(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf, int size)
{
	struct dvb_ringbuffer *tab[] = { cirbuf, ciwbuf, NULL }, **p;
	void *data;

	for (p = tab; *p; p++) {
		data = vmalloc(size);
		if (!data) {
			while (p-- != tab) {
				vfree(p[0]->data);
				p[0]->data = NULL;
			}
			return -ENOMEM;
		}
		dvb_ringbuffer_init(*p, data, size);
	}
	return 0;
}

static void ci_ll_flush(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
{
	dvb_ringbuffer_flush_spinlock_wakeup(cirbuf);
	dvb_ringbuffer_flush_spinlock_wakeup(ciwbuf);
}

static void ci_ll_release(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
{
	vfree(cirbuf->data);
	cirbuf->data = NULL;
	vfree(ciwbuf->data);
	ciwbuf->data = NULL;
}

static int ci_ll_reset(struct dvb_ringbuffer *cibuf, struct file *file,
		       int slots, ca_slot_info_t *slot)
{
	int i;
	int len = 0;
	u8 msg[8] = { 0x00, 0x06, 0x00, 0x00, 0xff, 0x02, 0x00, 0x00 };

	for (i = 0; i < 2; i++) {
		if (slots & (1 << i))
			len += 8;
	}

	if (dvb_ringbuffer_free(cibuf) < len)
		return -EBUSY;

	for (i = 0; i < 2; i++) {
		if (slots & (1 << i)) {
			msg[2] = i;
			dvb_ringbuffer_write(cibuf, msg, 8);
			slot[i].flags = 0;
		}
	}

	return 0;
}

static ssize_t ci_ll_write(struct dvb_ringbuffer *cibuf, struct file *file,
			   const char __user *buf, size_t count, loff_t *ppos)
{
	int free;
	int non_blocking = file->f_flags & O_NONBLOCK;
	u8 *page = (u8 *)__get_free_page(GFP_USER);
	int res;

	if (!page)
		return -ENOMEM;

	res = -EINVAL;
	if (count > 2048)
		goto out;

	res = -EFAULT;
	if (copy_from_user(page, buf, count))
		goto out;

	free = dvb_ringbuffer_free(cibuf);
	if (count + 2 > free) {
		res = -EWOULDBLOCK;
		if (non_blocking)
			goto out;
		res = -ERESTARTSYS;
		if (wait_event_interruptible(cibuf->queue,
					     (dvb_ringbuffer_free(cibuf) >= count + 2)))
			goto out;
	}

	DVB_RINGBUFFER_WRITE_BYTE(cibuf, count >> 8);
	DVB_RINGBUFFER_WRITE_BYTE(cibuf, count & 0xff);

	res = dvb_ringbuffer_write(cibuf, page, count);
out:
	free_page((unsigned long)page);
	return res;
}

static ssize_t ci_ll_read(struct dvb_ringbuffer *cibuf, struct file *file,
			  char __user *buf, size_t count, loff_t *ppos)
{
	int avail;
	int non_blocking = file->f_flags & O_NONBLOCK;
	ssize_t len;

	if (!cibuf->data || !count)
		return 0;
	if (non_blocking && (dvb_ringbuffer_empty(cibuf)))
		return -EWOULDBLOCK;
	if (wait_event_interruptible(cibuf->queue,
				     !dvb_ringbuffer_empty(cibuf)))
		return -ERESTARTSYS;
	avail = dvb_ringbuffer_avail(cibuf);
	if (avail < 4)
		return 0;
	len = DVB_RINGBUFFER_PEEK(cibuf, 0) << 8;
	len |= DVB_RINGBUFFER_PEEK(cibuf, 1);
	if (avail < len + 2 || count < len)
		return -EINVAL;
	DVB_RINGBUFFER_SKIP(cibuf, 2);

	return dvb_ringbuffer_read_user(cibuf, buf, len);
}

static int dvb_ca_open(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct av7110 *av7110 = dvbdev->priv;
	int err = dvb_generic_open(inode, file);

	dprintk(8, "av7110:%p\n",av7110);

	if (err < 0)
		return err;
	ci_ll_flush(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
	return 0;
}

static unsigned int dvb_ca_poll (struct file *file, poll_table *wait)
{
	struct dvb_device *dvbdev = file->private_data;
	struct av7110 *av7110 = dvbdev->priv;
	struct dvb_ringbuffer *rbuf = &av7110->ci_rbuffer;
	struct dvb_ringbuffer *wbuf = &av7110->ci_wbuffer;
	unsigned int mask = 0;

	dprintk(8, "av7110:%p\n",av7110);

	poll_wait(file, &rbuf->queue, wait);
	poll_wait(file, &wbuf->queue, wait);

	if (!dvb_ringbuffer_empty(rbuf))
		mask |= (POLLIN | POLLRDNORM);

	if (dvb_ringbuffer_free(wbuf) > 1024)
		mask |= (POLLOUT | POLLWRNORM);

	return mask;
}

static int dvb_ca_ioctl(struct file *file, unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct av7110 *av7110 = dvbdev->priv;
	unsigned long arg = (unsigned long) parg;

	dprintk(8, "av7110:%p\n",av7110);

	switch (cmd) {
	case CA_RESET:
		return ci_ll_reset(&av7110->ci_wbuffer, file, arg, &av7110->ci_slot[0]);
		break;
	case CA_GET_CAP:
	{
		ca_caps_t cap;

		cap.slot_num = 2;
		cap.slot_type = (FW_CI_LL_SUPPORT(av7110->arm_app) ?
				 CA_CI_LINK : CA_CI) | CA_DESCR;
		cap.descr_num = 16;
		cap.descr_type = CA_ECD;
		memcpy(parg, &cap, sizeof(cap));
		break;
	}

	case CA_GET_SLOT_INFO:
	{
		ca_slot_info_t *info=(ca_slot_info_t *)parg;

		if (info->num < 0 || info->num > 1)
			return -EINVAL;
		av7110->ci_slot[info->num].num = info->num;
		av7110->ci_slot[info->num].type = FW_CI_LL_SUPPORT(av7110->arm_app) ?
							CA_CI_LINK : CA_CI;
		memcpy(info, &av7110->ci_slot[info->num], sizeof(ca_slot_info_t));
		break;
	}

	case CA_GET_MSG:
		break;

	case CA_SEND_MSG:
		break;

	case CA_GET_DESCR_INFO:
	{
		ca_descr_info_t info;

		info.num = 16;
		info.type = CA_ECD;
		memcpy(parg, &info, sizeof (info));
		break;
	}

	case CA_SET_DESCR:
	{
		ca_descr_t *descr = (ca_descr_t*) parg;

		if (descr->index >= 16)
			return -EINVAL;
		if (descr->parity > 1)
			return -EINVAL;
		av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetDescr, 5,
			      (descr->index<<8)|descr->parity,
			      (descr->cw[0]<<8)|descr->cw[1],
			      (descr->cw[2]<<8)|descr->cw[3],
			      (descr->cw[4]<<8)|descr->cw[5],
			      (descr->cw[6]<<8)|descr->cw[7]);
		break;
	}

	default:
		return -EINVAL;
	}
	return 0;
}

static ssize_t dvb_ca_write(struct file *file, const char __user *buf,
			    size_t count, loff_t *ppos)
{
	struct dvb_device *dvbdev = file->private_data;
	struct av7110 *av7110 = dvbdev->priv;

	dprintk(8, "av7110:%p\n",av7110);
	return ci_ll_write(&av7110->ci_wbuffer, file, buf, count, ppos);
}

static ssize_t dvb_ca_read(struct file *file, char __user *buf,
			   size_t count, loff_t *ppos)
{
	struct dvb_device *dvbdev = file->private_data;
	struct av7110 *av7110 = dvbdev->priv;

	dprintk(8, "av7110:%p\n",av7110);
	return ci_ll_read(&av7110->ci_rbuffer, file, buf, count, ppos);
}

static const struct file_operations dvb_ca_fops = {
	.owner		= THIS_MODULE,
	.read		= dvb_ca_read,
	.write		= dvb_ca_write,
	.unlocked_ioctl	= dvb_generic_ioctl,
	.open		= dvb_ca_open,
	.release	= dvb_generic_release,
	.poll		= dvb_ca_poll,
	.llseek		= default_llseek,
};

static struct dvb_device dvbdev_ca = {
	.priv		= NULL,
	.users		= 1,
	.writers	= 1,
	.fops		= &dvb_ca_fops,
	.kernel_ioctl	= dvb_ca_ioctl,
};


int av7110_ca_register(struct av7110 *av7110)
{
	return dvb_register_device(&av7110->dvb_adapter, &av7110->ca_dev,
				   &dvbdev_ca, av7110, DVB_DEVICE_CA);
}

void av7110_ca_unregister(struct av7110 *av7110)
{
	dvb_unregister_device(av7110->ca_dev);
}

int av7110_ca_init(struct av7110* av7110)
{
	return ci_ll_init(&av7110->ci_rbuffer, &av7110->ci_wbuffer, 8192);
}

void av7110_ca_exit(struct av7110* av7110)
{
	ci_ll_release(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
}