[media] Altera FPGA based CI driver module

An Altera FPGA CI module for NetUP Dual DVB-T/C RF CI card.

Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 942 insertions, 0 deletions

diff --git a/drivers/media/video/cx23885/Kconfig b/drivers/media/video/cx23885/Kconfig
index 6b4a516addfe..5e5faadd678f 100644
--- a/drivers/media/video/cx23885/Kconfig
+++ b/drivers/media/video/cx23885/Kconfig
@@ -33,3 +33,12 @@ config VIDEO_CX23885
           To compile this driver as a module, choose M here: the
           module will be called cx23885
 
+config MEDIA_ALTERA_CI
+        tristate "Altera FPGA based CI module"
+        depends on VIDEO_CX23885 && DVB_CORE
+        select STAPL_ALTERA
+        ---help---
+          An Altera FPGA CI module for NetUP Dual DVB-T/C RF CI card.
+
+          To compile this driver as a module, choose M here: the
+          module will be called altera-ci
diff --git a/drivers/media/video/cx23885/Makefile b/drivers/media/video/cx23885/Makefile
index e2ee95f660d8..23293c7b6ac7 100644
--- a/drivers/media/video/cx23885/Makefile
+++ b/drivers/media/video/cx23885/Makefile
@@ -5,6 +5,7 @@ cx23885-objs	:= cx23885-cards.o cx23885-video.o cx23885-vbi.o \
                     cx23885-f300.o
 
 obj-$(CONFIG_VIDEO_CX23885) += cx23885.o
+obj-$(CONFIG_MEDIA_ALTERA_CI) += altera-ci.o
 
 EXTRA_CFLAGS += -Idrivers/media/video
 EXTRA_CFLAGS += -Idrivers/media/common/tuners
diff --git a/drivers/media/video/cx23885/altera-ci.c b/drivers/media/video/cx23885/altera-ci.c
new file mode 100644
index 000000000000..e5c0873aca15
--- /dev/null
+++ b/drivers/media/video/cx23885/altera-ci.c
@@ -0,0 +1,830 @@
+/*
+ * altera-ci.c
+ *
+ *  CI driver in conjunction with NetUp Dual DVB-T/C RF CI card
+ *
+ * Copyright (C) 2010,2011 NetUP Inc.
+ * Copyright (C) 2010,2011 Igor M. Liplianin <liplianin@netup.ru>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * currently cx23885 GPIO's used.
+ * GPIO-0 ~INT in
+ * GPIO-1 TMS out
+ * GPIO-2 ~reset chips out
+ * GPIO-3 to GPIO-10 data/addr for CA in/out
+ * GPIO-11 ~CS out
+ * GPIO-12 AD_RG out
+ * GPIO-13 ~WR out
+ * GPIO-14 ~RD out
+ * GPIO-15 ~RDY in
+ * GPIO-16 TCK out
+ * GPIO-17 TDO in
+ * GPIO-18 TDI out
+ */
+/*
+ *  Bit definitions for MC417_RWD and MC417_OEN registers
+ * bits 31-16
+ * +-----------+
+ * | Reserved  |
+ * +-----------+
+ *   bit 15  bit 14  bit 13 bit 12  bit 11  bit 10  bit 9   bit 8
+ * +-------+-------+-------+-------+-------+-------+-------+-------+
+ * |  TDI  |  TDO  |  TCK  |  RDY# |  #RD  |  #WR  | AD_RG |  #CS  |
+ * +-------+-------+-------+-------+-------+-------+-------+-------+
+ *  bit 7   bit 6   bit 5   bit 4   bit 3   bit 2   bit 1   bit 0
+ * +-------+-------+-------+-------+-------+-------+-------+-------+
+ * |  DATA7|  DATA6|  DATA5|  DATA4|  DATA3|  DATA2|  DATA1|  DATA0|
+ * +-------+-------+-------+-------+-------+-------+-------+-------+
+ */
+#include <linux/version.h>
+#include <media/videobuf-dma-sg.h>
+#include <media/videobuf-dvb.h>
+#include "altera-ci.h"
+#include "dvb_ca_en50221.h"
+
+/* FPGA regs */
+#define NETUP_CI_INT_CTRL       0x00
+#define NETUP_CI_BUSCTRL2       0x01
+#define NETUP_CI_ADDR0          0x04
+#define NETUP_CI_ADDR1          0x05
+#define NETUP_CI_DATA           0x06
+#define NETUP_CI_BUSCTRL        0x07
+#define NETUP_CI_PID_ADDR0      0x08
+#define NETUP_CI_PID_ADDR1      0x09
+#define NETUP_CI_PID_DATA       0x0a
+#define NETUP_CI_TSA_DIV        0x0c
+#define NETUP_CI_TSB_DIV        0x0d
+#define NETUP_CI_REVISION       0x0f
+
+/* const for ci op */
+#define NETUP_CI_FLG_CTL        1
+#define NETUP_CI_FLG_RD         1
+#define NETUP_CI_FLG_AD         1
+
+static unsigned int ci_dbg;
+module_param(ci_dbg, int, 0644);
+MODULE_PARM_DESC(ci_dbg, "Enable CI debugging");
+
+static unsigned int pid_dbg;
+module_param(pid_dbg, int, 0644);
+MODULE_PARM_DESC(pid_dbg, "Enable PID filtering debugging");
+
+MODULE_DESCRIPTION("altera FPGA CI module");
+MODULE_AUTHOR("Igor M. Liplianin  <liplianin@netup.ru>");
+MODULE_LICENSE("GPL");
+
+#define ci_dbg_print(args...) \
+        do { \
+                if (ci_dbg) \
+                        printk(KERN_DEBUG args); \
+        } while (0)
+
+#define pid_dbg_print(args...) \
+        do { \
+                if (pid_dbg) \
+                        printk(KERN_DEBUG args); \
+        } while (0)
+
+struct altera_ci_state;
+struct netup_hw_pid_filter;
+
+struct fpga_internal {
+        void *dev;
+        struct mutex fpga_mutex;/* two CI's on the same fpga */
+        struct netup_hw_pid_filter *pid_filt[2];
+        struct altera_ci_state *state[2];
+        struct work_struct work;
+        int (*fpga_rw) (void *dev, int flag, int data, int rw);
+        int cis_used;
+        int filts_used;
+        int strt_wrk;
+};
+
+/* stores all private variables for communication with CI */
+struct altera_ci_state {
+        struct fpga_internal *internal;
+        struct dvb_ca_en50221 ca;
+        int status;
+        int nr;
+};
+
+/* stores all private variables for hardware pid filtering */
+struct netup_hw_pid_filter {
+        struct fpga_internal *internal;
+        struct dvb_demux *demux;
+        /* save old functions */
+        int (*start_feed)(struct dvb_demux_feed *feed);
+        int (*stop_feed)(struct dvb_demux_feed *feed);
+
+        int status;
+        int nr;
+};
+
+/* internal params node */
+struct fpga_inode {
+        /* pointer for internal params, one for each pair of CI's */
+        struct fpga_internal            *internal;
+        struct fpga_inode               *next_inode;
+};
+
+/* first internal params */
+static struct fpga_inode *fpga_first_inode;
+
+/* find chip by dev */
+static struct fpga_inode *find_inode(void *dev)
+{
+        struct fpga_inode *temp_chip = fpga_first_inode;
+
+        if (temp_chip == NULL)
+                return temp_chip;
+
+        /*
+         Search for the last fpga CI chip or
+         find it by dev */
+        while ((temp_chip != NULL) &&
+                                (temp_chip->internal->dev != dev))
+                temp_chip = temp_chip->next_inode;
+
+        return temp_chip;
+}
+/* check demux */
+static struct fpga_internal *check_filter(struct fpga_internal *temp_int,
+                                                void *demux_dev, int filt_nr)
+{
+        if (temp_int == NULL)
+                return NULL;
+
+        if ((temp_int->pid_filt[filt_nr]) == NULL)
+                return NULL;
+
+        if (temp_int->pid_filt[filt_nr]->demux == demux_dev)
+                return temp_int;
+
+        return NULL;
+}
+
+/* find chip by demux */
+static struct fpga_inode *find_dinode(void *demux_dev)
+{
+        struct fpga_inode *temp_chip = fpga_first_inode;
+        struct fpga_internal *temp_int;
+
+        /*
+         * Search of the last fpga CI chip or
+         * find it by demux
+         */
+        while (temp_chip != NULL) {
+                if (temp_chip->internal != NULL) {
+                        temp_int = temp_chip->internal;
+                        if (check_filter(temp_int, demux_dev, 0))
+                                break;
+                        if (check_filter(temp_int, demux_dev, 1))
+                                break;
+                }
+
+                temp_chip = temp_chip->next_inode;
+        }
+
+        return temp_chip;
+}
+
+/* deallocating chip */
+static void remove_inode(struct fpga_internal *internal)
+{
+        struct fpga_inode *prev_node = fpga_first_inode;
+        struct fpga_inode *del_node = find_inode(internal->dev);
+
+        if (del_node != NULL) {
+                if (del_node == fpga_first_inode) {
+                        fpga_first_inode = del_node->next_inode;
+                } else {
+                        while (prev_node->next_inode != del_node)
+                                prev_node = prev_node->next_inode;
+
+                        if (del_node->next_inode == NULL)
+                                prev_node->next_inode = NULL;
+                        else
+                                prev_node->next_inode =
+                                        prev_node->next_inode->next_inode;
+                }
+
+                kfree(del_node);
+        }
+}
+
+/* allocating new chip */
+static struct fpga_inode *append_internal(struct fpga_internal *internal)
+{
+        struct fpga_inode *new_node = fpga_first_inode;
+
+        if (new_node == NULL) {
+                new_node = kmalloc(sizeof(struct fpga_inode), GFP_KERNEL);
+                fpga_first_inode = new_node;
+        } else {
+                while (new_node->next_inode != NULL)
+                        new_node = new_node->next_inode;
+
+                new_node->next_inode =
+                                kmalloc(sizeof(struct fpga_inode), GFP_KERNEL);
+                if (new_node->next_inode != NULL)
+                        new_node = new_node->next_inode;
+                else
+                        new_node = NULL;
+        }
+
+        if (new_node != NULL) {
+                new_node->internal = internal;
+                new_node->next_inode = NULL;
+        }
+
+        return new_node;
+}
+
+static int netup_fpga_op_rw(struct fpga_internal *inter, int addr,
+                                                        u8 val, u8 read)
+{
+        inter->fpga_rw(inter->dev, NETUP_CI_FLG_AD, addr, 0);
+        return inter->fpga_rw(inter->dev, 0, val, read);
+}
+
+/* flag - mem/io, read - read/write */
+int altera_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot,
+                                u8 flag, u8 read, int addr, u8 val)
+{
+
+        struct altera_ci_state *state = en50221->data;
+        struct fpga_internal *inter = state->internal;
+
+        u8 store;
+        int mem = 0;
+
+        if (0 != slot)
+                return -EINVAL;
+
+        mutex_lock(&inter->fpga_mutex);
+
+        netup_fpga_op_rw(inter, NETUP_CI_ADDR0, ((addr << 1) & 0xfe), 0);
+        netup_fpga_op_rw(inter, NETUP_CI_ADDR1, ((addr >> 7) & 0x7f), 0);
+        store = netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL, 0, NETUP_CI_FLG_RD);
+
+        store &= 0x3f;
+        store |= ((state->nr << 7) | (flag << 6));
+
+        netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL, store, 0);
+        mem = netup_fpga_op_rw(inter, NETUP_CI_DATA, val, read);
+
+        mutex_unlock(&inter->fpga_mutex);
+
+        ci_dbg_print("%s: %s: addr=[0x%02x], %s=%x\n", __func__,
+                        (read) ? "read" : "write", addr,
+                        (flag == NETUP_CI_FLG_CTL) ? "ctl" : "mem",
+                        (read) ? mem : val);
+
+        return mem;
+}
+
+int altera_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
+                                                int slot, int addr)
+{
+        return altera_ci_op_cam(en50221, slot, 0, NETUP_CI_FLG_RD, addr, 0);
+}
+
+int altera_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
+                                                int slot, int addr, u8 data)
+{
+        return altera_ci_op_cam(en50221, slot, 0, 0, addr, data);
+}
+
+int altera_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
+{
+        return altera_ci_op_cam(en50221, slot, NETUP_CI_FLG_CTL,
+                                                NETUP_CI_FLG_RD, addr, 0);
+}
+
+int altera_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot,
+                                                u8 addr, u8 data)
+{
+        return altera_ci_op_cam(en50221, slot, NETUP_CI_FLG_CTL, 0, addr, data);
+}
+
+int altera_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
+{
+        struct altera_ci_state *state = en50221->data;
+        struct fpga_internal *inter = state->internal;
+        /* reasonable timeout for CI reset is 10 seconds */
+        unsigned long t_out = jiffies + msecs_to_jiffies(9999);
+        int ret;
+
+        ci_dbg_print("%s\n", __func__);
+
+        if (0 != slot)
+                return -EINVAL;
+
+        mutex_lock(&inter->fpga_mutex);
+
+        ret = netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL, 0, NETUP_CI_FLG_RD);
+        netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL,
+                                ret | (1 << (5 - state->nr)), 0);
+
+        for (;;) {
+                mdelay(50);
+                ret = netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL,
+                                                0, NETUP_CI_FLG_RD);
+                if ((ret & (1 << (5 - state->nr))) == 0)
+                        break;
+                if (time_after(jiffies, t_out))
+                        break;
+        }
+
+        mutex_unlock(&inter->fpga_mutex);
+
+        ci_dbg_print("%s: %d msecs\n", __func__,
+                jiffies_to_msecs(jiffies + msecs_to_jiffies(9999) - t_out));
+
+        return 0;
+}
+
+int altera_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
+{
+        /* not implemented */
+        return 0;
+}
+
+int altera_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221, int slot)
+{
+        struct altera_ci_state *state = en50221->data;
+        struct fpga_internal *inter = state->internal;
+        int ret;
+
+        ci_dbg_print("%s\n", __func__);
+
+        if (0 != slot)
+                return -EINVAL;
+
+        mutex_lock(&inter->fpga_mutex);
+
+        ret = netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL, 0, NETUP_CI_FLG_RD);
+        netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL,
+                                ret | (1 << (3 - state->nr)), 0);
+
+        mutex_unlock(&inter->fpga_mutex);
+
+        return 0;
+}
+
+/* work handler */
+static void netup_read_ci_status(struct work_struct *work)
+{
+        struct fpga_internal *inter =
+                        container_of(work, struct fpga_internal, work);
+        int ret;
+
+        ci_dbg_print("%s\n", __func__);
+
+        mutex_lock(&inter->fpga_mutex);
+        /* ack' irq */
+        ret = netup_fpga_op_rw(inter, NETUP_CI_INT_CTRL, 0, NETUP_CI_FLG_RD);
+        ret = netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL, 0, NETUP_CI_FLG_RD);
+
+        mutex_unlock(&inter->fpga_mutex);
+
+        if (inter->state[1] != NULL) {
+                inter->state[1]->status =
+                                ((ret & 1) == 0 ?
+                                DVB_CA_EN50221_POLL_CAM_PRESENT |
+                                DVB_CA_EN50221_POLL_CAM_READY : 0);
+                ci_dbg_print("%s: setting CI[1] status = 0x%x\n",
+                                __func__, inter->state[1]->status);
+        };
+
+        if (inter->state[0] != NULL) {
+                inter->state[0]->status =
+                                ((ret & 2) == 0 ?
+                                DVB_CA_EN50221_POLL_CAM_PRESENT |
+                                DVB_CA_EN50221_POLL_CAM_READY : 0);
+                ci_dbg_print("%s: setting CI[0] status = 0x%x\n",
+                                __func__, inter->state[0]->status);
+        };
+}
+
+/* CI irq handler */
+int altera_ci_irq(void *dev)
+{
+        struct fpga_inode *temp_int = NULL;
+        struct fpga_internal *inter = NULL;
+
+        ci_dbg_print("%s\n", __func__);
+
+        if (dev != NULL) {
+                temp_int = find_inode(dev);
+                if (temp_int != NULL) {
+                        inter = temp_int->internal;
+                        schedule_work(&inter->work);
+                }
+        }
+
+        return 1;
+}
+EXPORT_SYMBOL(altera_ci_irq);
+
+int altera_poll_ci_slot_status(struct dvb_ca_en50221 *en50221, int slot,
+                                                                int open)
+{
+        struct altera_ci_state *state = en50221->data;
+
+        if (0 != slot)
+                return -EINVAL;
+
+        return state->status;
+}
+
+void altera_hw_filt_release(void *main_dev, int filt_nr)
+{
+        struct fpga_inode *temp_int = find_inode(main_dev);
+        struct netup_hw_pid_filter *pid_filt = NULL;
+
+        ci_dbg_print("%s\n", __func__);
+
+        if (temp_int != NULL) {
+                pid_filt = temp_int->internal->pid_filt[filt_nr - 1];
+                /* stored old feed controls */
+                pid_filt->demux->start_feed = pid_filt->start_feed;
+                pid_filt->demux->stop_feed = pid_filt->stop_feed;
+
+                if (((--(temp_int->internal->filts_used)) <= 0) &&
+                         ((temp_int->internal->cis_used) <= 0)) {
+
+                        ci_dbg_print("%s: Actually removing\n", __func__);
+
+                        remove_inode(temp_int->internal);
+                        kfree(pid_filt->internal);
+                }
+
+                kfree(pid_filt);
+
+        }
+
+}
+EXPORT_SYMBOL(altera_hw_filt_release);
+
+void altera_ci_release(void *dev, int ci_nr)
+{
+        struct fpga_inode *temp_int = find_inode(dev);
+        struct altera_ci_state *state = NULL;
+
+        ci_dbg_print("%s\n", __func__);
+
+        if (temp_int != NULL) {
+                state = temp_int->internal->state[ci_nr - 1];
+                altera_hw_filt_release(dev, ci_nr);
+
+
+                if (((temp_int->internal->filts_used) <= 0) &&
+                                ((--(temp_int->internal->cis_used)) <= 0)) {
+
+                        ci_dbg_print("%s: Actually removing\n", __func__);
+
+                        remove_inode(temp_int->internal);
+                        kfree(state->internal);
+                }
+
+                if (state != NULL) {
+                        if (state->ca.data != NULL)
+                                dvb_ca_en50221_release(&state->ca);
+
+                        kfree(state);
+                }
+        }
+
+}
+EXPORT_SYMBOL(altera_ci_release);
+
+static void altera_pid_control(struct netup_hw_pid_filter *pid_filt,
+                u16 pid, int onoff)
+{
+        struct fpga_internal *inter = pid_filt->internal;
+        u8 store = 0;
+
+        if (pid == 0x2000)
+                return;
+
+        mutex_lock(&inter->fpga_mutex);
+
+        netup_fpga_op_rw(inter, NETUP_CI_PID_ADDR0, (pid >> 3) & 0xff, 0);
+        netup_fpga_op_rw(inter, NETUP_CI_PID_ADDR1,
+                        ((pid >> 11) & 0x03) | (pid_filt->nr << 2), 0);
+
+        store = netup_fpga_op_rw(inter, NETUP_CI_PID_DATA, 0, NETUP_CI_FLG_RD);
+
+        if (onoff)/* 0 - on, 1 - off */
+                store |= (1 << (pid & 7));
+        else
+                store &= ~(1 << (pid & 7));
+
+        netup_fpga_op_rw(inter, NETUP_CI_PID_DATA, store, 0);
+
+        mutex_unlock(&inter->fpga_mutex);
+
+        pid_dbg_print("%s: (%d) set pid: %5d 0x%04x '%s'\n", __func__,
+                pid_filt->nr, pid, pid, onoff ? "off" : "on");
+}
+
+static void altera_toggle_fullts_streaming(struct netup_hw_pid_filter *pid_filt,
+                                        int filt_nr, int onoff)
+{
+        struct fpga_internal *inter = pid_filt->internal;
+        u8 store = 0;
+        int i;
+
+        pid_dbg_print("%s: pid_filt->nr[%d]  now %s\n", __func__, pid_filt->nr,
+                        onoff ? "off" : "on");
+
+        if (onoff)/* 0 - on, 1 - off */
+                store = 0xff;/* ignore pid */
+        else
+                store = 0;/* enable pid */
+
+        mutex_lock(&inter->fpga_mutex);
+
+        for (i = 0; i < 1024; i++) {
+                netup_fpga_op_rw(inter, NETUP_CI_PID_ADDR0, i & 0xff, 0);
+
+                netup_fpga_op_rw(inter, NETUP_CI_PID_ADDR1,
+                                ((i >> 8) & 0x03) | (pid_filt->nr << 2), 0);
+
+                netup_fpga_op_rw(inter, NETUP_CI_PID_DATA, store, 0);
+        }
+
+        mutex_unlock(&inter->fpga_mutex);
+}
+
+int altera_pid_feed_control(void *demux_dev, int filt_nr,
+                struct dvb_demux_feed *feed, int onoff)
+{
+        struct fpga_inode *temp_int = find_dinode(demux_dev);
+        struct fpga_internal *inter = temp_int->internal;
+        struct netup_hw_pid_filter *pid_filt = inter->pid_filt[filt_nr - 1];
+
+        altera_pid_control(pid_filt, feed->pid, onoff ? 0 : 1);
+        /* call old feed proc's */
+        if (onoff)
+                pid_filt->start_feed(feed);
+        else
+                pid_filt->stop_feed(feed);
+
+        if (feed->pid == 0x2000)
+                altera_toggle_fullts_streaming(pid_filt, filt_nr,
+                                                onoff ? 0 : 1);
+
+        return 0;
+}
+EXPORT_SYMBOL(altera_pid_feed_control);
+
+int altera_ci_start_feed(struct dvb_demux_feed *feed, int num)
+{
+        altera_pid_feed_control(feed->demux, num, feed, 1);
+
+        return 0;
+}
+
+int altera_ci_stop_feed(struct dvb_demux_feed *feed, int num)
+{
+        altera_pid_feed_control(feed->demux, num, feed, 0);
+
+        return 0;
+}
+
+int altera_ci_start_feed_1(struct dvb_demux_feed *feed)
+{
+        return altera_ci_start_feed(feed, 1);
+}
+
+int altera_ci_stop_feed_1(struct dvb_demux_feed *feed)
+{
+        return altera_ci_stop_feed(feed, 1);
+}
+
+int altera_ci_start_feed_2(struct dvb_demux_feed *feed)
+{
+        return altera_ci_start_feed(feed, 2);
+}
+
+int altera_ci_stop_feed_2(struct dvb_demux_feed *feed)
+{
+        return altera_ci_stop_feed(feed, 2);
+}
+
+int altera_hw_filt_init(struct altera_ci_config *config, int hw_filt_nr)
+{
+        struct netup_hw_pid_filter *pid_filt = NULL;
+        struct fpga_inode *temp_int = find_inode(config->dev);
+        struct fpga_internal *inter = NULL;
+        int ret = 0;
+
+        pid_filt = kzalloc(sizeof(struct netup_hw_pid_filter), GFP_KERNEL);
+
+        ci_dbg_print("%s\n", __func__);
+
+        if (!pid_filt) {
+                ret = -ENOMEM;
+                goto err;
+        }
+
+        if (temp_int != NULL) {
+                inter = temp_int->internal;
+                (inter->filts_used)++;
+                ci_dbg_print("%s: Find Internal Structure!\n", __func__);
+        } else {
+                inter = kzalloc(sizeof(struct fpga_internal), GFP_KERNEL);
+                if (!inter) {
+                        ret = -ENOMEM;
+                        goto err;
+                }
+
+                temp_int = append_internal(inter);
+                inter->filts_used = 1;
+                inter->dev = config->dev;
+                inter->fpga_rw = config->fpga_rw;
+                mutex_init(&inter->fpga_mutex);
+                inter->strt_wrk = 1;
+                ci_dbg_print("%s: Create New Internal Structure!\n", __func__);
+        }
+
+        ci_dbg_print("%s: setting hw pid filter = 0x%x for ci = %d\n", __func__,
+                                                (int)pid_filt, hw_filt_nr - 1);
+        inter->pid_filt[hw_filt_nr - 1] = pid_filt;
+        pid_filt->demux = config->demux;
+        pid_filt->internal = inter;
+        pid_filt->nr = hw_filt_nr - 1;
+        /* store old feed controls */
+        pid_filt->start_feed = config->demux->start_feed;
+        pid_filt->stop_feed = config->demux->stop_feed;
+        /* replace with new feed controls */
+        if (hw_filt_nr == 1) {
+                pid_filt->demux->start_feed = altera_ci_start_feed_1;
+                pid_filt->demux->stop_feed = altera_ci_stop_feed_1;
+        } else if (hw_filt_nr == 2) {
+                pid_filt->demux->start_feed = altera_ci_start_feed_2;
+                pid_filt->demux->stop_feed = altera_ci_stop_feed_2;
+        }
+
+        altera_toggle_fullts_streaming(pid_filt, 0, 1);
+
+        return 0;
+err:
+        ci_dbg_print("%s: Can't init hardware filter: Error %d\n",
+                     __func__, ret);
+
+        kfree(pid_filt);
+
+        return ret;
+}
+EXPORT_SYMBOL(altera_hw_filt_init);
+
+int altera_ci_init(struct altera_ci_config *config, int ci_nr)
+{
+        struct altera_ci_state *state;
+        struct fpga_inode *temp_int = find_inode(config->dev);
+        struct fpga_internal *inter = NULL;
+        int ret = 0;
+        u8 store = 0;
+
+        state = kzalloc(sizeof(struct altera_ci_state), GFP_KERNEL);
+
+        ci_dbg_print("%s\n", __func__);
+
+        if (!state) {
+                ret = -ENOMEM;
+                goto err;
+        }
+
+        if (temp_int != NULL) {
+                inter = temp_int->internal;
+                (inter->cis_used)++;
+                ci_dbg_print("%s: Find Internal Structure!\n", __func__);
+        } else {
+                inter = kzalloc(sizeof(struct fpga_internal), GFP_KERNEL);
+                if (!inter) {
+                        ret = -ENOMEM;
+                        goto err;
+                }
+
+                temp_int = append_internal(inter);
+                inter->cis_used = 1;
+                inter->dev = config->dev;
+                inter->fpga_rw = config->fpga_rw;
+                mutex_init(&inter->fpga_mutex);
+                inter->strt_wrk = 1;
+                ci_dbg_print("%s: Create New Internal Structure!\n", __func__);
+        }
+
+        ci_dbg_print("%s: setting state = 0x%x for ci = %d\n", __func__,
+                                                (int)state, ci_nr - 1);
+        inter->state[ci_nr - 1] = state;
+        state->internal = inter;
+        state->nr = ci_nr - 1;
+
+        state->ca.owner = THIS_MODULE;
+        state->ca.read_attribute_mem = altera_ci_read_attribute_mem;
+        state->ca.write_attribute_mem = altera_ci_write_attribute_mem;
+        state->ca.read_cam_control = altera_ci_read_cam_ctl;
+        state->ca.write_cam_control = altera_ci_write_cam_ctl;
+        state->ca.slot_reset = altera_ci_slot_reset;
+        state->ca.slot_shutdown = altera_ci_slot_shutdown;
+        state->ca.slot_ts_enable = altera_ci_slot_ts_ctl;
+        state->ca.poll_slot_status = altera_poll_ci_slot_status;
+        state->ca.data = state;
+
+        ret = dvb_ca_en50221_init(config->adapter,
+                                   &state->ca,
+                                   /* flags */ 0,
+                                   /* n_slots */ 1);
+        if (0 != ret)
+                goto err;
+
+        altera_hw_filt_init(config, ci_nr);
+
+        if (inter->strt_wrk) {
+                INIT_WORK(&inter->work, netup_read_ci_status);
+                inter->strt_wrk = 0;
+        }
+
+        ci_dbg_print("%s: CI initialized!\n", __func__);
+
+        mutex_lock(&inter->fpga_mutex);
+
+        /* Enable div */
+        netup_fpga_op_rw(inter, NETUP_CI_TSA_DIV, 0x0, 0);
+        netup_fpga_op_rw(inter, NETUP_CI_TSB_DIV, 0x0, 0);
+
+        /* enable TS out */
+        store = netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL2, 0, NETUP_CI_FLG_RD);
+        store |= (3 << 4);
+        netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL2, store, 0);
+
+        ret = netup_fpga_op_rw(inter, NETUP_CI_REVISION, 0, NETUP_CI_FLG_RD);
+        /* enable irq */
+        netup_fpga_op_rw(inter, NETUP_CI_INT_CTRL, 0x44, 0);
+
+        mutex_unlock(&inter->fpga_mutex);
+
+        ci_dbg_print("%s: NetUP CI Revision = 0x%x\n", __func__, ret);
+
+        schedule_work(&inter->work);
+
+        return 0;
+err:
+        ci_dbg_print("%s: Cannot initialize CI: Error %d.\n", __func__, ret);
+
+        kfree(state);
+
+        return ret;
+}
+EXPORT_SYMBOL(altera_ci_init);
+
+int altera_ci_tuner_reset(void *dev, int ci_nr)
+{
+        struct fpga_inode *temp_int = find_inode(dev);
+        struct fpga_internal *inter = NULL;
+        u8 store;
+
+        ci_dbg_print("%s\n", __func__);
+
+        if (temp_int == NULL)
+                return -1;
+
+        if (temp_int->internal == NULL)
+                return -1;
+
+        inter = temp_int->internal;
+
+        mutex_lock(&inter->fpga_mutex);
+
+        store = netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL2, 0, NETUP_CI_FLG_RD);
+        store &= ~(4 << (2 - ci_nr));
+        netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL2, store, 0);
+        msleep(100);
+        store |= (4 << (2 - ci_nr));
+        netup_fpga_op_rw(inter, NETUP_CI_BUSCTRL2, store, 0);
+
+        mutex_unlock(&inter->fpga_mutex);
+
+        return 0;
+}
+EXPORT_SYMBOL(altera_ci_tuner_reset);
diff --git a/drivers/media/video/cx23885/altera-ci.h b/drivers/media/video/cx23885/altera-ci.h
new file mode 100644
index 000000000000..ba0c6c05082a
--- /dev/null
+++ b/drivers/media/video/cx23885/altera-ci.h
@@ -0,0 +1,102 @@
+/*
+ * altera-ci.c
+ *
+ *  CI driver in conjunction with NetUp Dual DVB-T/C RF CI card
+ *
+ * Copyright (C) 2010 NetUP Inc.
+ * Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#ifndef __ALTERA_CI_H
+#define __ALTERA_CI_H
+
+#define ALT_DATA        0x000000ff
+#define ALT_TDI         0x00008000
+#define ALT_TDO         0x00004000
+#define ALT_TCK         0x00002000
+#define ALT_RDY         0x00001000
+#define ALT_RD          0x00000800
+#define ALT_WR          0x00000400
+#define ALT_AD_RG       0x00000200
+#define ALT_CS          0x00000100
+
+struct altera_ci_config {
+        void *dev;/* main dev, for example cx23885_dev */
+        void *adapter;/* for CI to connect to */
+        struct dvb_demux *demux;/* for hardware PID filter to connect to */
+        int (*fpga_rw) (void *dev, int ad_rg, int val, int rw);
+};
+
+#if defined(CONFIG_MEDIA_ALTERA_CI) || (defined(CONFIG_MEDIA_ALTERA_CI_MODULE) \
+                                                        && defined(MODULE))
+
+extern int altera_ci_init(struct altera_ci_config *config, int ci_nr);
+extern void altera_ci_release(void *dev, int ci_nr);
+extern int altera_ci_irq(void *dev);
+extern int altera_ci_tuner_reset(void *dev, int ci_nr);
+
+#else
+
+static inline int altera_ci_init(struct altera_ci_config *config, int ci_nr)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return 0;
+}
+
+static inline void altera_ci_release(void *dev, int ci_nr)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return 0;
+}
+
+static inline int altera_ci_irq(void *dev)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return 0;
+}
+
+static int altera_ci_tuner_reset(void *dev, int ci_nr)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return 0;
+}
+
+#endif
+#if 0
+static inline int altera_hw_filt_init(struct altera_ci_config *config,
+                                                        int hw_filt_nr)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return 0;
+}
+
+static inline void altera_hw_filt_release(void *dev, int filt_nr)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return 0;
+}
+
+static inline int altera_pid_feed_control(void *dev, int filt_nr,
+                struct dvb_demux_feed *dvbdmxfeed, int onoff)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return 0;
+}
+
+#endif /* CONFIG_MEDIA_ALTERA_CI */
+
+#endif /* __ALTERA_CI_H */