1 files changed, 380 insertions, 0 deletions
diff --git a/drivers/media/pci/ttpci/av7110_ca.c b/drivers/media/pci/ttpci/av7110_ca.c
new file mode 100644
index 000000000..c1338e074
--- /dev/null
+++ b/drivers/media/pci/ttpci/av7110_ca.c
@@ -0,0 +1,380 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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>
+ *
+ * the project's page is at https://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, struct ca_slot_info *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 __poll_t 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;
+	__poll_t 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 |= (EPOLLIN | EPOLLRDNORM);
+
+	if (dvb_ringbuffer_free(wbuf) > 1024)
+		mask |= (EPOLLOUT | EPOLLWRNORM);
+
+	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;
+	int ret = 0;
+
+	dprintk(8, "av7110:%p\n",av7110);
+
+	if (mutex_lock_interruptible(&av7110->ioctl_mutex))
+		return -ERESTARTSYS;
+
+	switch (cmd) {
+	case CA_RESET:
+		ret = ci_ll_reset(&av7110->ci_wbuffer, file, arg,
+				  &av7110->ci_slot[0]);
+		break;
+	case CA_GET_CAP:
+	{
+		struct ca_caps 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:
+	{
+		struct ca_slot_info *info=(struct ca_slot_info *)parg;
+
+		if (info->num < 0 || info->num > 1) {
+			mutex_unlock(&av7110->ioctl_mutex);
+			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(struct ca_slot_info));
+		break;
+	}
+
+	case CA_GET_MSG:
+		break;
+
+	case CA_SEND_MSG:
+		break;
+
+	case CA_GET_DESCR_INFO:
+	{
+		struct ca_descr_info info;
+
+		info.num = 16;
+		info.type = CA_ECD;
+		memcpy(parg, &info, sizeof (info));
+		break;
+	}
+
+	case CA_SET_DESCR:
+	{
+		struct ca_descr *descr = (struct ca_descr*) parg;
+
+		if (descr->index >= 16 || descr->parity > 1) {
+			mutex_unlock(&av7110->ioctl_mutex);
+			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:
+		ret = -EINVAL;
+		break;
+	}
+
+	mutex_unlock(&av7110->ioctl_mutex);
+	return ret;
+}
+
+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, 0);
+}
+
+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);
+}