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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / media / dvb / ttpci / av7110_ca.c
blobc7a65b1544a330e34a2e500883981336ba23c6c4
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/dvb/
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
38 #include "av7110.h"
39 #include "av7110_hw.h"
40 #include "av7110_ca.h"
41
42
43 void CI_handle(struct av7110 *av7110, u8 *data, u16 len)
44 {
45 dprintk(8, "av7110:%p\n",av7110);
46
47 if (len < 3)
48 return;
49 switch (data[0]) {
50 case CI_MSG_CI_INFO:
51 if (data[2] != 1 && data[2] != 2)
52 break;
53 switch (data[1]) {
54 case 0:
55 av7110->ci_slot[data[2] - 1].flags = 0;
56 break;
57 case 1:
58 av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_PRESENT;
59 break;
60 case 2:
61 av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_READY;
62 break;
63 }
64 break;
65 case CI_SWITCH_PRG_REPLY:
66 //av7110->ci_stat=data[1];
67 break;
68 default:
69 break;
70 }
71 }
72
73
74 void ci_get_data(struct dvb_ringbuffer *cibuf, u8 *data, int len)
75 {
76 if (dvb_ringbuffer_free(cibuf) < len + 2)
77 return;
78
79 DVB_RINGBUFFER_WRITE_BYTE(cibuf, len >> 8);
80 DVB_RINGBUFFER_WRITE_BYTE(cibuf, len & 0xff);
81 dvb_ringbuffer_write(cibuf, data, len);
82 wake_up_interruptible(&cibuf->queue);
83 }
84
85
86 /******************************************************************************
87 * CI link layer file ops
88 ******************************************************************************/
89
90 static int ci_ll_init(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf, int size)
91 {
92 struct dvb_ringbuffer *tab[] = { cirbuf, ciwbuf, NULL }, **p;
93 void *data;
94
95 for (p = tab; *p; p++) {
96 data = vmalloc(size);
97 if (!data) {
98 while (p-- != tab) {
99 vfree(p[0]->data);
100 p[0]->data = NULL;
101 }
102 return -ENOMEM;
103 }
104 dvb_ringbuffer_init(*p, data, size);
105 }
106 return 0;
107 }
108
109 static void ci_ll_flush(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
110 {
111 dvb_ringbuffer_flush_spinlock_wakeup(cirbuf);
112 dvb_ringbuffer_flush_spinlock_wakeup(ciwbuf);
113 }
114
115 static void ci_ll_release(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
116 {
117 vfree(cirbuf->data);
118 cirbuf->data = NULL;
119 vfree(ciwbuf->data);
120 ciwbuf->data = NULL;
121 }
122
123 static int ci_ll_reset(struct dvb_ringbuffer *cibuf, struct file *file,
124 int slots, ca_slot_info_t *slot)
125 {
126 int i;
127 int len = 0;
128 u8 msg[8] = { 0x00, 0x06, 0x00, 0x00, 0xff, 0x02, 0x00, 0x00 };
129
130 for (i = 0; i < 2; i++) {
131 if (slots & (1 << i))
132 len += 8;
133 }
134
135 if (dvb_ringbuffer_free(cibuf) < len)
136 return -EBUSY;
137
138 for (i = 0; i < 2; i++) {
139 if (slots & (1 << i)) {
140 msg[2] = i;
141 dvb_ringbuffer_write(cibuf, msg, 8);
142 slot[i].flags = 0;
143 }
144 }
145
146 return 0;
147 }
148
149 static ssize_t ci_ll_write(struct dvb_ringbuffer *cibuf, struct file *file,
150 const char __user *buf, size_t count, loff_t *ppos)
151 {
152 int free;
153 int non_blocking = file->f_flags & O_NONBLOCK;
154 u8 *page = (u8 *)__get_free_page(GFP_USER);
155 int res;
156
157 if (!page)
158 return -ENOMEM;
159
160 res = -EINVAL;
161 if (count > 2048)
162 goto out;
163
164 res = -EFAULT;
165 if (copy_from_user(page, buf, count))
166 goto out;
167
168 free = dvb_ringbuffer_free(cibuf);
169 if (count + 2 > free) {
170 res = -EWOULDBLOCK;
171 if (non_blocking)
172 goto out;
173 res = -ERESTARTSYS;
174 if (wait_event_interruptible(cibuf->queue,
175 (dvb_ringbuffer_free(cibuf) >= count + 2)))
176 goto out;
177 }
178
179 DVB_RINGBUFFER_WRITE_BYTE(cibuf, count >> 8);
180 DVB_RINGBUFFER_WRITE_BYTE(cibuf, count & 0xff);
181
182 res = dvb_ringbuffer_write(cibuf, page, count);
183 out:
184 free_page((unsigned long)page);
185 return res;
186 }
187
188 static ssize_t ci_ll_read(struct dvb_ringbuffer *cibuf, struct file *file,
189 char __user *buf, size_t count, loff_t *ppos)
190 {
191 int avail;
192 int non_blocking = file->f_flags & O_NONBLOCK;
193 ssize_t len;
194
195 if (!cibuf->data || !count)
196 return 0;
197 if (non_blocking && (dvb_ringbuffer_empty(cibuf)))
198 return -EWOULDBLOCK;
199 if (wait_event_interruptible(cibuf->queue,
200 !dvb_ringbuffer_empty(cibuf)))
201 return -ERESTARTSYS;
202 avail = dvb_ringbuffer_avail(cibuf);
203 if (avail < 4)
204 return 0;
205 len = DVB_RINGBUFFER_PEEK(cibuf, 0) << 8;
206 len |= DVB_RINGBUFFER_PEEK(cibuf, 1);
207 if (avail < len + 2 || count < len)
208 return -EINVAL;
209 DVB_RINGBUFFER_SKIP(cibuf, 2);
210
211 return dvb_ringbuffer_read_user(cibuf, buf, len);
212 }
213
214 static int dvb_ca_open(struct inode *inode, struct file *file)
215 {
216 struct dvb_device *dvbdev = file->private_data;
217 struct av7110 *av7110 = dvbdev->priv;
218 int err = dvb_generic_open(inode, file);
219
220 dprintk(8, "av7110:%p\n",av7110);
221
222 if (err < 0)
223 return err;
224 ci_ll_flush(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
225 return 0;
226 }
227
228 static unsigned int dvb_ca_poll (struct file *file, poll_table *wait)
229 {
230 struct dvb_device *dvbdev = file->private_data;
231 struct av7110 *av7110 = dvbdev->priv;
232 struct dvb_ringbuffer *rbuf = &av7110->ci_rbuffer;
233 struct dvb_ringbuffer *wbuf = &av7110->ci_wbuffer;
234 unsigned int mask = 0;
235
236 dprintk(8, "av7110:%p\n",av7110);
237
238 poll_wait(file, &rbuf->queue, wait);
239 poll_wait(file, &wbuf->queue, wait);
240
241 if (!dvb_ringbuffer_empty(rbuf))
242 mask |= (POLLIN | POLLRDNORM);
243
244 if (dvb_ringbuffer_free(wbuf) > 1024)
245 mask |= (POLLOUT | POLLWRNORM);
246
247 return mask;
248 }
249
250 static int dvb_ca_ioctl(struct inode *inode, struct file *file,
251 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 > 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
328 static 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
338 static 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
348 static const struct file_operations dvb_ca_fops = {
349 .owner = THIS_MODULE,
350 .read = dvb_ca_read,
351 .write = dvb_ca_write,
352 .ioctl = dvb_generic_ioctl,
353 .open = dvb_ca_open,
354 .release = dvb_generic_release,
355 .poll = dvb_ca_poll,
356 };
357
358 static struct dvb_device dvbdev_ca = {
359 .priv = NULL,
360 .users = 1,
361 .writers = 1,
362 .fops = &dvb_ca_fops,
363 .kernel_ioctl = dvb_ca_ioctl,
364 };
365
366
367 int av7110_ca_register(struct av7110 *av7110)
368 {
369 return dvb_register_device(&av7110->dvb_adapter, &av7110->ca_dev,
370 &dvbdev_ca, av7110, DVB_DEVICE_CA);
371 }
372
373 void av7110_ca_unregister(struct av7110 *av7110)
374 {
375 dvb_unregister_device(av7110->ca_dev);
376 }
377
378 int av7110_ca_init(struct av7110* av7110)
379 {
380 return ci_ll_init(&av7110->ci_rbuffer, &av7110->ci_wbuffer, 8192);
381 }
382
383 void av7110_ca_exit(struct av7110* av7110)
384 {
385 ci_ll_release(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
386 }