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/drivers/media/dvb/ttpci/av7110_ca.c

https://bitbucket.org/ndreys/linux-sunxi
C | 387 lines | 292 code | 62 blank | 33 comment | 39 complexity | 5276d90c9c8afa9d8b714d55d7973347 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  1/*
  2 * av7110_ca.c: CA and CI stuff
  3 *
  4 * Copyright (C) 1999-2002 Ralph  Metzler
  5 *                       & Marcus Metzler for convergence integrated media GmbH
  6 *
  7 * originally based on code by:
  8 * Copyright (C) 1998,1999 Christian Theiss <mistert@rz.fh-augsburg.de>
  9 *
 10 * This program is free software; you can redistribute it and/or
 11 * modify it under the terms of the GNU General Public License
 12 * as published by the Free Software Foundation; either version 2
 13 * of the License, or (at your option) any later version.
 14 *
 15 *
 16 * This program is distributed in the hope that it will be useful,
 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 19 * GNU General Public License for more details.
 20 *
 21 *
 22 * You should have received a copy of the GNU General Public License
 23 * along with this program; if not, write to the Free Software
 24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 25 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 26 *
 27 *
 28 * the project's page is at http://www.linuxtv.org/ 
 29 */
 30
 31#include <linux/kernel.h>
 32#include <linux/types.h>
 33#include <linux/delay.h>
 34#include <linux/fs.h>
 35#include <linux/timer.h>
 36#include <linux/poll.h>
 37#include <linux/gfp.h>
 38
 39#include "av7110.h"
 40#include "av7110_hw.h"
 41#include "av7110_ca.h"
 42
 43
 44void CI_handle(struct av7110 *av7110, u8 *data, u16 len)
 45{
 46	dprintk(8, "av7110:%p\n",av7110);
 47
 48	if (len < 3)
 49		return;
 50	switch (data[0]) {
 51	case CI_MSG_CI_INFO:
 52		if (data[2] != 1 && data[2] != 2)
 53			break;
 54		switch (data[1]) {
 55		case 0:
 56			av7110->ci_slot[data[2] - 1].flags = 0;
 57			break;
 58		case 1:
 59			av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_PRESENT;
 60			break;
 61		case 2:
 62			av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_READY;
 63			break;
 64		}
 65		break;
 66	case CI_SWITCH_PRG_REPLY:
 67		//av7110->ci_stat=data[1];
 68		break;
 69	default:
 70		break;
 71	}
 72}
 73
 74
 75void ci_get_data(struct dvb_ringbuffer *cibuf, u8 *data, int len)
 76{
 77	if (dvb_ringbuffer_free(cibuf) < len + 2)
 78		return;
 79
 80	DVB_RINGBUFFER_WRITE_BYTE(cibuf, len >> 8);
 81	DVB_RINGBUFFER_WRITE_BYTE(cibuf, len & 0xff);
 82	dvb_ringbuffer_write(cibuf, data, len);
 83	wake_up_interruptible(&cibuf->queue);
 84}
 85
 86
 87/******************************************************************************
 88 * CI link layer file ops
 89 ******************************************************************************/
 90
 91static int ci_ll_init(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf, int size)
 92{
 93	struct dvb_ringbuffer *tab[] = { cirbuf, ciwbuf, NULL }, **p;
 94	void *data;
 95
 96	for (p = tab; *p; p++) {
 97		data = vmalloc(size);
 98		if (!data) {
 99			while (p-- != tab) {
100				vfree(p[0]->data);
101				p[0]->data = NULL;
102			}
103			return -ENOMEM;
104		}
105		dvb_ringbuffer_init(*p, data, size);
106	}
107	return 0;
108}
109
110static void ci_ll_flush(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
111{
112	dvb_ringbuffer_flush_spinlock_wakeup(cirbuf);
113	dvb_ringbuffer_flush_spinlock_wakeup(ciwbuf);
114}
115
116static void ci_ll_release(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
117{
118	vfree(cirbuf->data);
119	cirbuf->data = NULL;
120	vfree(ciwbuf->data);
121	ciwbuf->data = NULL;
122}
123
124static int ci_ll_reset(struct dvb_ringbuffer *cibuf, struct file *file,
125		       int slots, ca_slot_info_t *slot)
126{
127	int i;
128	int len = 0;
129	u8 msg[8] = { 0x00, 0x06, 0x00, 0x00, 0xff, 0x02, 0x00, 0x00 };
130
131	for (i = 0; i < 2; i++) {
132		if (slots & (1 << i))
133			len += 8;
134	}
135
136	if (dvb_ringbuffer_free(cibuf) < len)
137		return -EBUSY;
138
139	for (i = 0; i < 2; i++) {
140		if (slots & (1 << i)) {
141			msg[2] = i;
142			dvb_ringbuffer_write(cibuf, msg, 8);
143			slot[i].flags = 0;
144		}
145	}
146
147	return 0;
148}
149
150static ssize_t ci_ll_write(struct dvb_ringbuffer *cibuf, struct file *file,
151			   const char __user *buf, size_t count, loff_t *ppos)
152{
153	int free;
154	int non_blocking = file->f_flags & O_NONBLOCK;
155	u8 *page = (u8 *)__get_free_page(GFP_USER);
156	int res;
157
158	if (!page)
159		return -ENOMEM;
160
161	res = -EINVAL;
162	if (count > 2048)
163		goto out;
164
165	res = -EFAULT;
166	if (copy_from_user(page, buf, count))
167		goto out;
168
169	free = dvb_ringbuffer_free(cibuf);
170	if (count + 2 > free) {
171		res = -EWOULDBLOCK;
172		if (non_blocking)
173			goto out;
174		res = -ERESTARTSYS;
175		if (wait_event_interruptible(cibuf->queue,
176					     (dvb_ringbuffer_free(cibuf) >= count + 2)))
177			goto out;
178	}
179
180	DVB_RINGBUFFER_WRITE_BYTE(cibuf, count >> 8);
181	DVB_RINGBUFFER_WRITE_BYTE(cibuf, count & 0xff);
182
183	res = dvb_ringbuffer_write(cibuf, page, count);
184out:
185	free_page((unsigned long)page);
186	return res;
187}
188
189static ssize_t ci_ll_read(struct dvb_ringbuffer *cibuf, struct file *file,
190			  char __user *buf, size_t count, loff_t *ppos)
191{
192	int avail;
193	int non_blocking = file->f_flags & O_NONBLOCK;
194	ssize_t len;
195
196	if (!cibuf->data || !count)
197		return 0;
198	if (non_blocking && (dvb_ringbuffer_empty(cibuf)))
199		return -EWOULDBLOCK;
200	if (wait_event_interruptible(cibuf->queue,
201				     !dvb_ringbuffer_empty(cibuf)))
202		return -ERESTARTSYS;
203	avail = dvb_ringbuffer_avail(cibuf);
204	if (avail < 4)
205		return 0;
206	len = DVB_RINGBUFFER_PEEK(cibuf, 0) << 8;
207	len |= DVB_RINGBUFFER_PEEK(cibuf, 1);
208	if (avail < len + 2 || count < len)
209		return -EINVAL;
210	DVB_RINGBUFFER_SKIP(cibuf, 2);
211
212	return dvb_ringbuffer_read_user(cibuf, buf, len);
213}
214
215static int dvb_ca_open(struct inode *inode, struct file *file)
216{
217	struct dvb_device *dvbdev = file->private_data;
218	struct av7110 *av7110 = dvbdev->priv;
219	int err = dvb_generic_open(inode, file);
220
221	dprintk(8, "av7110:%p\n",av7110);
222
223	if (err < 0)
224		return err;
225	ci_ll_flush(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
226	return 0;
227}
228
229static unsigned int dvb_ca_poll (struct file *file, poll_table *wait)
230{
231	struct dvb_device *dvbdev = file->private_data;
232	struct av7110 *av7110 = dvbdev->priv;
233	struct dvb_ringbuffer *rbuf = &av7110->ci_rbuffer;
234	struct dvb_ringbuffer *wbuf = &av7110->ci_wbuffer;
235	unsigned int mask = 0;
236
237	dprintk(8, "av7110:%p\n",av7110);
238
239	poll_wait(file, &rbuf->queue, wait);
240	poll_wait(file, &wbuf->queue, wait);
241
242	if (!dvb_ringbuffer_empty(rbuf))
243		mask |= (POLLIN | POLLRDNORM);
244
245	if (dvb_ringbuffer_free(wbuf) > 1024)
246		mask |= (POLLOUT | POLLWRNORM);
247
248	return mask;
249}
250
251static int dvb_ca_ioctl(struct file *file, unsigned int cmd, void *parg)
252{
253	struct dvb_device *dvbdev = file->private_data;
254	struct av7110 *av7110 = dvbdev->priv;
255	unsigned long arg = (unsigned long) parg;
256
257	dprintk(8, "av7110:%p\n",av7110);
258
259	switch (cmd) {
260	case CA_RESET:
261		return ci_ll_reset(&av7110->ci_wbuffer, file, arg, &av7110->ci_slot[0]);
262		break;
263	case CA_GET_CAP:
264	{
265		ca_caps_t cap;
266
267		cap.slot_num = 2;
268		cap.slot_type = (FW_CI_LL_SUPPORT(av7110->arm_app) ?
269				 CA_CI_LINK : CA_CI) | CA_DESCR;
270		cap.descr_num = 16;
271		cap.descr_type = CA_ECD;
272		memcpy(parg, &cap, sizeof(cap));
273		break;
274	}
275
276	case CA_GET_SLOT_INFO:
277	{
278		ca_slot_info_t *info=(ca_slot_info_t *)parg;
279
280		if (info->num < 0 || info->num > 1)
281			return -EINVAL;
282		av7110->ci_slot[info->num].num = info->num;
283		av7110->ci_slot[info->num].type = FW_CI_LL_SUPPORT(av7110->arm_app) ?
284							CA_CI_LINK : CA_CI;
285		memcpy(info, &av7110->ci_slot[info->num], sizeof(ca_slot_info_t));
286		break;
287	}
288
289	case CA_GET_MSG:
290		break;
291
292	case CA_SEND_MSG:
293		break;
294
295	case CA_GET_DESCR_INFO:
296	{
297		ca_descr_info_t info;
298
299		info.num = 16;
300		info.type = CA_ECD;
301		memcpy(parg, &info, sizeof (info));
302		break;
303	}
304
305	case CA_SET_DESCR:
306	{
307		ca_descr_t *descr = (ca_descr_t*) parg;
308
309		if (descr->index >= 16)
310			return -EINVAL;
311		if (descr->parity > 1)
312			return -EINVAL;
313		av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetDescr, 5,
314			      (descr->index<<8)|descr->parity,
315			      (descr->cw[0]<<8)|descr->cw[1],
316			      (descr->cw[2]<<8)|descr->cw[3],
317			      (descr->cw[4]<<8)|descr->cw[5],
318			      (descr->cw[6]<<8)|descr->cw[7]);
319		break;
320	}
321
322	default:
323		return -EINVAL;
324	}
325	return 0;
326}
327
328static ssize_t dvb_ca_write(struct file *file, const char __user *buf,
329			    size_t count, loff_t *ppos)
330{
331	struct dvb_device *dvbdev = file->private_data;
332	struct av7110 *av7110 = dvbdev->priv;
333
334	dprintk(8, "av7110:%p\n",av7110);
335	return ci_ll_write(&av7110->ci_wbuffer, file, buf, count, ppos);
336}
337
338static ssize_t dvb_ca_read(struct file *file, char __user *buf,
339			   size_t count, loff_t *ppos)
340{
341	struct dvb_device *dvbdev = file->private_data;
342	struct av7110 *av7110 = dvbdev->priv;
343
344	dprintk(8, "av7110:%p\n",av7110);
345	return ci_ll_read(&av7110->ci_rbuffer, file, buf, count, ppos);
346}
347
348static const struct file_operations dvb_ca_fops = {
349	.owner		= THIS_MODULE,
350	.read		= dvb_ca_read,
351	.write		= dvb_ca_write,
352	.unlocked_ioctl	= dvb_generic_ioctl,
353	.open		= dvb_ca_open,
354	.release	= dvb_generic_release,
355	.poll		= dvb_ca_poll,
356	.llseek		= default_llseek,
357};
358
359static struct dvb_device dvbdev_ca = {
360	.priv		= NULL,
361	.users		= 1,
362	.writers	= 1,
363	.fops		= &dvb_ca_fops,
364	.kernel_ioctl	= dvb_ca_ioctl,
365};
366
367
368int av7110_ca_register(struct av7110 *av7110)
369{
370	return dvb_register_device(&av7110->dvb_adapter, &av7110->ca_dev,
371				   &dvbdev_ca, av7110, DVB_DEVICE_CA);
372}
373
374void av7110_ca_unregister(struct av7110 *av7110)
375{
376	dvb_unregister_device(av7110->ca_dev);
377}
378
379int av7110_ca_init(struct av7110* av7110)
380{
381	return ci_ll_init(&av7110->ci_rbuffer, &av7110->ci_wbuffer, 8192);
382}
383
384void av7110_ca_exit(struct av7110* av7110)
385{
386	ci_ll_release(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
387}