1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * av7110_ca.c: CA and CI stuff
5 * Copyright (C) 1999-2002 Ralph Metzler
6 * & Marcus Metzler for convergence integrated media GmbH
8 * originally based on code by:
9 * Copyright (C) 1998,1999 Christian Theiss <mistert@rz.fh-augsburg.de>
11 * the project's page is at https://linuxtv.org
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/delay.h>
18 #include <linux/timer.h>
19 #include <linux/poll.h>
20 #include <linux/gfp.h>
23 #include "av7110_hw.h"
24 #include "av7110_ca.h"
27 void CI_handle(struct av7110 *av7110, u8 *data, u16 len)
29 dprintk(8, "av7110:%p\n",av7110);
35 if (data[2] != 1 && data[2] != 2)
39 av7110->ci_slot[data[2] - 1].flags = 0;
42 av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_PRESENT;
45 av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_READY;
49 case CI_SWITCH_PRG_REPLY:
50 //av7110->ci_stat=data[1];
58 void ci_get_data(struct dvb_ringbuffer *cibuf, u8 *data, int len)
60 if (dvb_ringbuffer_free(cibuf) < len + 2)
63 DVB_RINGBUFFER_WRITE_BYTE(cibuf, len >> 8);
64 DVB_RINGBUFFER_WRITE_BYTE(cibuf, len & 0xff);
65 dvb_ringbuffer_write(cibuf, data, len);
66 wake_up_interruptible(&cibuf->queue);
70 /******************************************************************************
71 * CI link layer file ops
72 ******************************************************************************/
74 static int ci_ll_init(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf, int size)
76 struct dvb_ringbuffer *tab[] = { cirbuf, ciwbuf, NULL }, **p;
79 for (p = tab; *p; p++) {
88 dvb_ringbuffer_init(*p, data, size);
93 static void ci_ll_flush(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
95 dvb_ringbuffer_flush_spinlock_wakeup(cirbuf);
96 dvb_ringbuffer_flush_spinlock_wakeup(ciwbuf);
99 static void ci_ll_release(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
107 static int ci_ll_reset(struct dvb_ringbuffer *cibuf, struct file *file,
108 int slots, struct ca_slot_info *slot)
112 u8 msg[8] = { 0x00, 0x06, 0x00, 0x00, 0xff, 0x02, 0x00, 0x00 };
114 for (i = 0; i < 2; i++) {
115 if (slots & (1 << i))
119 if (dvb_ringbuffer_free(cibuf) < len)
122 for (i = 0; i < 2; i++) {
123 if (slots & (1 << i)) {
125 dvb_ringbuffer_write(cibuf, msg, 8);
133 static ssize_t ci_ll_write(struct dvb_ringbuffer *cibuf, struct file *file,
134 const char __user *buf, size_t count, loff_t *ppos)
137 int non_blocking = file->f_flags & O_NONBLOCK;
138 u8 *page = (u8 *)__get_free_page(GFP_USER);
149 if (copy_from_user(page, buf, count))
152 free = dvb_ringbuffer_free(cibuf);
153 if (count + 2 > free) {
158 if (wait_event_interruptible(cibuf->queue,
159 (dvb_ringbuffer_free(cibuf) >= count + 2)))
163 DVB_RINGBUFFER_WRITE_BYTE(cibuf, count >> 8);
164 DVB_RINGBUFFER_WRITE_BYTE(cibuf, count & 0xff);
166 res = dvb_ringbuffer_write(cibuf, page, count);
168 free_page((unsigned long)page);
172 static ssize_t ci_ll_read(struct dvb_ringbuffer *cibuf, struct file *file,
173 char __user *buf, size_t count, loff_t *ppos)
176 int non_blocking = file->f_flags & O_NONBLOCK;
179 if (!cibuf->data || !count)
181 if (non_blocking && (dvb_ringbuffer_empty(cibuf)))
183 if (wait_event_interruptible(cibuf->queue,
184 !dvb_ringbuffer_empty(cibuf)))
186 avail = dvb_ringbuffer_avail(cibuf);
189 len = DVB_RINGBUFFER_PEEK(cibuf, 0) << 8;
190 len |= DVB_RINGBUFFER_PEEK(cibuf, 1);
191 if (avail < len + 2 || count < len)
193 DVB_RINGBUFFER_SKIP(cibuf, 2);
195 return dvb_ringbuffer_read_user(cibuf, buf, len);
198 static int dvb_ca_open(struct inode *inode, struct file *file)
200 struct dvb_device *dvbdev = file->private_data;
201 struct av7110 *av7110 = dvbdev->priv;
202 int err = dvb_generic_open(inode, file);
204 dprintk(8, "av7110:%p\n",av7110);
208 ci_ll_flush(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
212 static __poll_t dvb_ca_poll (struct file *file, poll_table *wait)
214 struct dvb_device *dvbdev = file->private_data;
215 struct av7110 *av7110 = dvbdev->priv;
216 struct dvb_ringbuffer *rbuf = &av7110->ci_rbuffer;
217 struct dvb_ringbuffer *wbuf = &av7110->ci_wbuffer;
220 dprintk(8, "av7110:%p\n",av7110);
222 poll_wait(file, &rbuf->queue, wait);
223 poll_wait(file, &wbuf->queue, wait);
225 if (!dvb_ringbuffer_empty(rbuf))
226 mask |= (EPOLLIN | EPOLLRDNORM);
228 if (dvb_ringbuffer_free(wbuf) > 1024)
229 mask |= (EPOLLOUT | EPOLLWRNORM);
234 static int dvb_ca_ioctl(struct file *file, unsigned int cmd, void *parg)
236 struct dvb_device *dvbdev = file->private_data;
237 struct av7110 *av7110 = dvbdev->priv;
238 unsigned long arg = (unsigned long) parg;
241 dprintk(8, "av7110:%p\n",av7110);
243 if (mutex_lock_interruptible(&av7110->ioctl_mutex))
248 ret = ci_ll_reset(&av7110->ci_wbuffer, file, arg,
249 &av7110->ci_slot[0]);
256 cap.slot_type = (FW_CI_LL_SUPPORT(av7110->arm_app) ?
257 CA_CI_LINK : CA_CI) | CA_DESCR;
259 cap.descr_type = CA_ECD;
260 memcpy(parg, &cap, sizeof(cap));
264 case CA_GET_SLOT_INFO:
266 struct ca_slot_info *info=(struct ca_slot_info *)parg;
268 if (info->num < 0 || info->num > 1) {
269 mutex_unlock(&av7110->ioctl_mutex);
272 av7110->ci_slot[info->num].num = info->num;
273 av7110->ci_slot[info->num].type = FW_CI_LL_SUPPORT(av7110->arm_app) ?
275 memcpy(info, &av7110->ci_slot[info->num], sizeof(struct ca_slot_info));
285 case CA_GET_DESCR_INFO:
287 struct ca_descr_info info;
291 memcpy(parg, &info, sizeof (info));
297 struct ca_descr *descr = (struct ca_descr*) parg;
299 if (descr->index >= 16 || descr->parity > 1) {
300 mutex_unlock(&av7110->ioctl_mutex);
303 av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetDescr, 5,
304 (descr->index<<8)|descr->parity,
305 (descr->cw[0]<<8)|descr->cw[1],
306 (descr->cw[2]<<8)|descr->cw[3],
307 (descr->cw[4]<<8)|descr->cw[5],
308 (descr->cw[6]<<8)|descr->cw[7]);
317 mutex_unlock(&av7110->ioctl_mutex);
321 static ssize_t dvb_ca_write(struct file *file, const char __user *buf,
322 size_t count, loff_t *ppos)
324 struct dvb_device *dvbdev = file->private_data;
325 struct av7110 *av7110 = dvbdev->priv;
327 dprintk(8, "av7110:%p\n",av7110);
328 return ci_ll_write(&av7110->ci_wbuffer, file, buf, count, ppos);
331 static ssize_t dvb_ca_read(struct file *file, char __user *buf,
332 size_t count, loff_t *ppos)
334 struct dvb_device *dvbdev = file->private_data;
335 struct av7110 *av7110 = dvbdev->priv;
337 dprintk(8, "av7110:%p\n",av7110);
338 return ci_ll_read(&av7110->ci_rbuffer, file, buf, count, ppos);
341 static const struct file_operations dvb_ca_fops = {
342 .owner = THIS_MODULE,
344 .write = dvb_ca_write,
345 .unlocked_ioctl = dvb_generic_ioctl,
347 .release = dvb_generic_release,
349 .llseek = default_llseek,
352 static struct dvb_device dvbdev_ca = {
356 .fops = &dvb_ca_fops,
357 .kernel_ioctl = dvb_ca_ioctl,
361 int av7110_ca_register(struct av7110 *av7110)
363 return dvb_register_device(&av7110->dvb_adapter, &av7110->ca_dev,
364 &dvbdev_ca, av7110, DVB_DEVICE_CA, 0);
367 void av7110_ca_unregister(struct av7110 *av7110)
369 dvb_unregister_device(av7110->ca_dev);
372 int av7110_ca_init(struct av7110* av7110)
374 return ci_ll_init(&av7110->ci_rbuffer, &av7110->ci_wbuffer, 8192);
377 void av7110_ca_exit(struct av7110* av7110)
379 ci_ll_release(&av7110->ci_rbuffer, &av7110->ci_wbuffer);