[linux-dvb] Problems with ca_zap

Oivind oivindg at gmail.com
Sat Jun 25 21:23:04 CEST 2005


Thanks for your info, I will look at this and see what I can do :)

Oivind


On 6/24/05, Manu Abraham <manu at kromtek.com> wrote:
> Oivind wrote:
> > I agree to that. I just want to inform that I am working on exactly
> 
> What about an EN50221 parser in the same lines as that of the PMT
> parser.. That would be quite simple and straight forward ..
> 
> I was thinking in that lines ..
> 
> > that right now. Maybe that code can give some ideas, I'll hopefull be
> > finished tonight.
> >
> 
> Try to make it simple ... Originall i had a PMT parser like this, after
> an unhappy ending, i switched on to the current PMT style of parsing ..
> 
> The current EN50221 style parsing was quick enough for me, but did not
> seem so in a wider sense ..
> 
> 
> I wrote a couple of lines for that, but staring at that code and all the
> messages gave me an extreme headache.. If you can give it a shot would
> be nice .. Need to be off this for a few hours at least ..
> 
> If you need to take a look at it, here it is .. If you give it a shot in
>   similar lines, that would be nice .. since it looks a bit modular..
> Maybe the code could be reused (the same concept i had in userspace with
> ca_zap, ended up making it into a library) by some other driver too ..
> 
> 
> 
> Just to know which parameters are masked i have a function in dst_ca.c,
> debug_twinhan_ca_parameters()..
> 
> What that function did was just to modify the EN50221 style message for
> the hardware requirements..
> 
> That would be helpful there.. You will find the ASIC bug also there ..
> 
> 
> Manu
> 
> 
> /*
>         CA-driver for TwinHan DST Frontend/Card
> 
>         Copyright (C) 2004, 2005 Manu Abraham (manu at kromtek.com)
> 
>         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.
> */
> 
> 
> 
> #include <linux/kernel.h>
> #include <linux/module.h>
> #include <linux/init.h>
> #include <linux/string.h>
> 
> #include <linux/dvb/ca.h>
> #include "dvbdev.h"
> #include "dvb_frontend.h"
> 
> #include "dst_ca.h"
> #include "dst_common.h"
> 
> static unsigned int verbose = 5;
> module_param(verbose, int, 0644);
> MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
> 
> static unsigned int debug = 1;
> module_param(debug, int, 0644);
> MODULE_PARM_DESC(debug, "debug messages, default is 1 (yes)");
> 
> #define dprintk if (debug) printk
> 
> /*      Need some more work     */
> static int ca_set_slot_descr(void)
> {
>         /*      We could make this more graceful ?      */
>         return -EOPNOTSUPP;
> }
> 
> /*      Need some more work     */
> static int ca_set_pid(void)
> {
>         /*      We could make this more graceful ?      */
>         return -EOPNOTSUPP;
> }
> 
> 
> static int put_checksum(u8 *check_string, int length)
> {
>         u8 i = 0, checksum = 0;
> 
>         if (verbose > 3) {
>                 dprintk("%s: ========================= Checksum calculation ===========================\n", __FUNCTION__);
>                 dprintk("%s: String Length=[0x%02x]\n", __FUNCTION__, length);
> 
>                 dprintk("%s: String=[", __FUNCTION__);
>         }
>         while (i < length) {
>                 if (verbose > 3)
>                         dprintk(" %02x", check_string[i]);
>                 checksum += check_string[i];
>                 i++;
>         }
>         if (verbose > 3) {
>                 dprintk(" ]\n");
>                 dprintk("%s: Sum=[%02x]\n", __FUNCTION__, checksum);
>         }
>         check_string[length] = ~checksum + 1;
>         if (verbose > 3) {
>                 dprintk("%s: Checksum=[%02x]\n", __FUNCTION__, check_string[length]);
>                 dprintk("%s: ==========================================================================\n", __FUNCTION__);
>         }
> 
>         return 0;
> }
> 
> static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
> {
>         u8 reply;
> 
>         dst_comm_init(state);
>         msleep(65);
> 
>         if (write_dst(state, data, len)) {
>                 dprintk("%s: Write not successful, trying to recover\n", __FUNCTION__);
>                 dst_error_recovery(state);
>                 return -1;
>         }
> 
>         if ((dst_pio_disable(state)) < 0) {
>                 dprintk("%s: DST PIO disable failed.\n", __FUNCTION__);
>                 return -1;
>         }
> 
>         if (read_dst(state, &reply, GET_ACK) < 0) {
>                 dprintk("%s: Read not successful, trying to recover\n", __FUNCTION__);
>                 dst_error_recovery(state);
>                 return -1;
>         }
> 
>         if (read) {
>                 if (! dst_wait_dst_ready(state, LONG_DELAY)) {
>                         dprintk("%s: 8820 not ready\n", __FUNCTION__);
>                         return -1;
>                 }
> 
>                 if (read_dst(state, ca_string, 128) < 0) {      /*      Try to make this dynamic        */
>                         dprintk("%s: Read not successful, trying to recover\n", __FUNCTION__);
>                         dst_error_recovery(state);
>                         return -1;
>                 }
>         }
> 
>         return 0;
> }
> 
> 
> static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
> {
>         u8 dst_ca_comm_err = 0;
> 
>         while (dst_ca_comm_err < RETRIES) {
>                 dst_comm_init(state);
>                 if (verbose > 2)
>                         dprintk("%s: Put Command\n", __FUNCTION__);
>                 if (dst_ci_command(state, data, ca_string, len, read)) {        // If error
>                         dst_error_recovery(state);
>                         dst_ca_comm_err++; // work required here.
>                 }
>                 break;
>         }
> 
>         return 0;
> }
> 
> 
> 
> static int ca_get_app_info(struct dst_state *state)
> {
>         static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};
> 
>         put_checksum(&command[0], command[0]);
>         if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {
>                 dprintk("%s: -->dst_put_ci FAILED !\n", __FUNCTION__);
>                 return -1;
>         }
>         if (verbose > 1) {
>                 dprintk("%s: -->dst_put_ci SUCCESS !\n", __FUNCTION__);
> 
>                 dprintk("%s: ================================ CI Module Application Info ======================================\n", __FUNCTION__);
>                 dprintk("%s: Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]\n",
>                         __FUNCTION__, state->messages[7], (state->messages[8] << 8) | state->messages[9],
>                         (state->messages[10] << 8) | state->messages[11], __FUNCTION__, (char *)(&state->messages[12]));
>                 dprintk("%s: ==================================================================================================\n", __FUNCTION__);
>         }
> 
>         return 0;
> }
> 
> static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void *arg)
> {
>         int i;
>         u8 slot_cap[256];
>         static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
> 
>         put_checksum(&slot_command[0], slot_command[0]);
>         if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
>                 dprintk("%s: -->dst_put_ci FAILED !\n", __FUNCTION__);
>                 return -1;
>         }
>         if (verbose > 1)
>                 dprintk("%s: -->dst_put_ci SUCCESS !\n", __FUNCTION__);
> 
>         /*      Will implement the rest soon            */
> 
>         if (verbose > 1) {
>                 dprintk("%s: Slot cap = [%d]\n", __FUNCTION__, slot_cap[7]);
>                 dprintk("===================================\n");
>                 for (i = 0; i < 8; i++)
>                         dprintk(" %d", slot_cap[i]);
>                 dprintk("\n");
>         }
> 
>         p_ca_caps->slot_num = 1;
>         p_ca_caps->slot_type = 1;
>         p_ca_caps->descr_num = slot_cap[7];
>         p_ca_caps->descr_type = 1;
> 
> 
>         if (copy_to_user((struct ca_caps *)arg, p_ca_caps, sizeof (struct ca_caps))) {
>                 return -EFAULT;
>         }
> 
>         return 0;
> }
> 
> /*      Need some more work     */
> static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void *arg)
> {
>         return -EOPNOTSUPP;
> }
> 
> 
> static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void *arg)
> {
>         int i;
>         static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
> 
>         u8 *slot_info = state->rxbuffer;
> 
>         put_checksum(&slot_command[0], 7);
>         if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
>                 dprintk("%s: -->dst_put_ci FAILED !\n", __FUNCTION__);
>                 return -1;
>         }
>         if (verbose > 1)
>                 dprintk("%s: -->dst_put_ci SUCCESS !\n", __FUNCTION__);
> 
>         /*      Will implement the rest soon            */
> 
>         if (verbose > 1) {
>                 dprintk("%s: Slot info = [%d]\n", __FUNCTION__, slot_info[3]);
>                 dprintk("===================================\n");
>                 for (i = 0; i < 8; i++)
>                         dprintk(" %d", slot_info[i]);
>                 dprintk("\n");
>         }
> 
>         if (slot_info[4] & 0x80) {
>                 p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
>                 p_ca_slot_info->num = 1;
>                 p_ca_slot_info->type = CA_CI;
>         }
>         else if (slot_info[4] & 0x40) {
>                 p_ca_slot_info->flags = CA_CI_MODULE_READY;
>                 p_ca_slot_info->num = 1;
>                 p_ca_slot_info->type = CA_CI;
>         }
>         else {
>                 p_ca_slot_info->flags = 0;
>         }
> 
>         if (copy_to_user((struct ca_slot_info *)arg, p_ca_slot_info, sizeof (struct ca_slot_info))) {
>                 return -EFAULT;
>         }
> 
>         return 0;
> }
> 
> 
> 
> 
> static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void *arg)
> {
>         u8 i = 0;
>         u32 command = 0;
> 
>         if (copy_from_user(p_ca_message, (void *)arg, sizeof (struct ca_msg)))
>                 return -EFAULT;
> 
> 
>         if (p_ca_message->msg) {
>                 if (verbose > 3)
>                         dprintk("Message = [%02x %02x %02x]\n", p_ca_message->msg[0], p_ca_message->msg[1], p_ca_message->msg[2]);
> 
>                 for (i = 0; i < 3; i++) {
>                         command = command | p_ca_message->msg[i];
>                         if (i < 2)
>                                 command = command << 8;
>                 }
>                 if (verbose > 3)
>                         dprintk("%s:Command=[0x%x]\n", __FUNCTION__, command);
> 
>                 switch (command) {
>                         case CA_APP_INFO:
>                                 memcpy(p_ca_message->msg, state->messages, 128);
>                                 if (copy_to_user((void *)arg, p_ca_message, sizeof (struct ca_msg)) )
>                                         return -EFAULT;
>                         break;
>                 }
>         }
> 
>         return 0;
> }
> 
> static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
> {
>         if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
>                 hw_buffer->msg[2] = p_ca_message->msg[1];               /*              MSB                     */
>                 hw_buffer->msg[3] = p_ca_message->msg[2];               /*              LSB                     */
>         }
>         else {
>                 hw_buffer->msg[0] = (length & 0xff) + 7;
>                 hw_buffer->msg[1] = 0x40;
>                 hw_buffer->msg[2] = 0x03;
>                 hw_buffer->msg[3] = 0x00;
>                 hw_buffer->msg[4] = 0x03;
>                 hw_buffer->msg[5] = length & 0xff;
>                 hw_buffer->msg[6] = 0x00;
>         }
>         return 0;
> }
> 
> 
> static int debug_8820_buffer(struct ca_msg *hw_buffer)
> {
>         unsigned int i;
> 
>         dprintk("%s:Debug=[", __FUNCTION__);
>         for (i = 0; i < (hw_buffer->msg[0] + 1); i++)
>                 dprintk(" %02x", hw_buffer->msg[i]);
>         dprintk("]\n");
> 
>         return 0;
> }
> 
> static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
> {
>         if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
>                 dprintk("%s: DST-CI Command failed.\n", __FUNCTION__);
>                 dprintk("%s: Resetting DST.\n", __FUNCTION__);
>                 rdc_reset_state(state);
>                 return -1;
>         }
>         if (verbose > 2)
>                 dprintk("%s: DST-CI Command succes.\n", __FUNCTION__);
> 
>         return 0;
> }
> 
> u32 asn_1_decode(u8 *asn_1_array)
> {
>         u8 length_field = 0, word_count = 0, count = 0;
>         u32 length = 0;
> 
>         length_field = asn_1_array[0];
>         dprintk("%s: Length field=[%02x]\n", __FUNCTION__, length_field);
>         if (length_field < 0x80) {
>                 length = length_field & 0x7f;
>                 dprintk("%s: Length=[%02x]\n", __FUNCTION__, length);
>         } else {
>                 word_count = length_field & 0x7f;
>                 for (count = 0; count < word_count; count++) {
>                         length = (length | asn_1_array[count + 1]) << 8;
>                         dprintk("%s: Length=[%04x]\n", __FUNCTION__, length);
>                 }
>         }
>         return length;
> }
> 
> static int init_buffer(u8 *buffer, u32 length)
> {
>         u32 i;
>         for (i = 0; i < length; i++)
>                 buffer[i] = 0;
> 
>         return 0;
> }
> 
> static int debug_string(u8 *msg, u32 length, u32 offset)
> {
>         u32 i;
> 
>         dprintk(" String=[ ");
>         for (i = offset; i < length; i++)
>                 dprintk("%02x ", msg[i]);
>         dprintk("]\n");
> 
>         return 0;
> }
> 
> static int copy_string(u8 *destination, u8 *source, u32 dest_offset, u32 source_offset, u32 length)
> {
>         u32 i;
>         dprintk("%s: Copying [", __FUNCTION__);
>         for (i = 0; i < length; i++) {
>                 destination[i + dest_offset] = source[i + source_offset];
>                 dprintk(" %02x", source[i + source_offset]);
>         }
>         dprintk("]\n");
> 
>         return i;
> }
> 
> static int debug_twinhan_ca_params(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer,
>                                                                 u8 reply, u8 query, u32 length, u32 hw_offset, u32 buf_offset)
> {
>         u32 count = 0;
> 
>         count = copy_string(hw_buffer->msg, p_ca_message->msg, hw_offset, buf_offset, length);
>         dprintk("%s: Hw Buffer ", __FUNCTION__);
>         hw_buffer->msg[length + hw_offset + 1] = dst_check_sum(hw_buffer->msg, (length + hw_offset));
>         debug_string(hw_buffer->msg, (length + hw_offset + 1), 0);
>         dprintk("%s: Reply = [%d]\n", __FUNCTION__, reply);
>         hw_buffer->msg[11] = 0;
>         hw_buffer->msg[12] += 1;        // maybe a asic bug !
>         hw_buffer->msg[23] &= 0x0f;
>         hw_buffer->msg[25] = 0;         // a test only
>         hw_buffer->msg[28] &= 0x0f;
>         hw_buffer->msg[30] = 0;
>         hw_buffer->msg[length + hw_offset] = dst_check_sum(hw_buffer->msg, (length + hw_offset - 1));
>         dprintk("%s: Checksum=[%02x]\n", __FUNCTION__, hw_buffer->msg[length + hw_offset + 1]);
>         write_to_8820(state, hw_buffer, (length + hw_offset + 1), reply);
> 
>         return 0;
> }
> 
> static int modify_string(u8 *message, u32 pos)
> {
>         message[pos] &= 0x0f;
> 
>         return 0;
> }
> 
> static int modify_3_bits(u8 *message, u32 pos)
> {
>         message[pos] &= 0x1f;
> 
>         return 0;
> }
> 
> static int modify_4_bits(u8 *message, u32 pos)
> {
>         message[pos] &= 0x0f;
> 
>         return 0;
> }
> 
> struct ca_descriptor {
>         u8 descriptor_tag;
>         u8 descriptor_length;
>         u16 ca_system_id;
>         u8 reserved;
>         u16 ca_pid;
>         u8 *p_private_data;
> };
> 
> struct streams {
>         u8 stream_type;
>         u8 reserved;
>         u16 es_pid;
>         u8 reserved;
>         u16 es_info_length;
>         u8 ca_pmt_cmd_id;
>         struct ca_descriptor *p_stream_descriptor;
> };
> 
> struct en50221 {
>         u32 ca_pmt_tag;
>         u32 length_field;
>         u8 ca_pmt_list_management;
>         u16 program_number;
>         u8 reserved_1;
>         u8 version_number;
>         u8 current_next;
>         u8 reserved_2;
>         u16 program_info_length;
>         u8 ca_pmt_cmd_id;
>         struct ca_descriptor *p_prog_descriptor;
>         struct streams *p_streams;
> 
> };
> 
> static int parse_en50221_descriptor(struct ca_descriptor *p_descriptor, u8 *buf, u16 pos)
> {
>         p_descriptor->descriptor_tag = buf[pos + 0];
>         p_descriptor->descriptor_length = buf[pos + 1];
> 
> }
> 
> static int parse_en50021_header(struct en50221 *p_en50221, u8 *buf, u16 pos)
> {
>         p_en50221->ca_pmt_tag = 0;
>         p_en50221->ca_pmt_tag = (p_en50221->ca_pmt_tag | buf[pos + 0]) << 8) | buf[pos + 1]) << 8) | buf[pos + 2];
>         p_en50221->length_field = asn_1_decode(&p_ca_message[pos + 3]); // should change this, length field is variable
>         p_en50221->ca_pmt_list_management = [pos + 4];
>         p_en50221->program_number = ((p_en50221->program_number | buf[pos + 5]) << 8) | buf[pos + 6];
>         p_en50221->reserved_1 = buf[pos + 7] >> 6;
>         p_en50221->version_number = (buf[pos + 7] >> 1) & 0x1f;
>         p_en50221->current_next = buf[pos + 7] & 0x01;
>         p_en50221->reserved_2 = buf[pos + 8] >> 4;
>         p_en50221->program_info_length = ((p_en50221->program_info_length | (buf[pos + 8] & 0x0f)) << 8) | buf[pos + 9];
> 
>         if (p_en50221->program_info_length)
>                 p_en50221->ca_pmt_cmd_id = buf[pos + 10];
> 
>         pos += 10;
> 
>         return pos;
> }
> 
> 
> 
> static int parse_en50221_message(struct en50221 *p_en50221, struct ca_msg *p_ca_message)
> {
>         u16 pos = 0;
> 
>         pos = parse_en50221_header(p_en50221, p_ca_message->msg, pos);
> 
> 
> }
> 
> 
> static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
> {
>         u32 length = 0, count = 0;
>         u8 asn_1_words, program_header_length;
>         u16 program_info_length = 0, es_info_length = 0;
>         u32 hw_offset = 0, buf_offset = 0, i;
>         u8 dst_tag_length;
> 
>         length = asn_1_decode(&p_ca_message->msg[3]);
>         dprintk("%s: CA Message length=[%d]\n", __FUNCTION__, length);
>         dprintk("%s: ASN.1 ", __FUNCTION__);
>         debug_string(&p_ca_message->msg[4], length, 0); // length does not include tag and length
> 
>         init_buffer(hw_buffer->msg, length);
>         handle_dst_tag(state, p_ca_message, hw_buffer, length);
> 
>         hw_offset = 7;
>         asn_1_words = 1; // just a hack to test, should compute this one
>         buf_offset = 3;
>         program_header_length = 6;
>         dst_tag_length = 7;
> 
> //      debug_twinhan_ca_params(state, p_ca_message, hw_buffer, reply, query, length, hw_offset, buf_offset);
> //      dprintk("%s: Program Header(BUF)", __FUNCTION__);
> //      debug_string(&p_ca_message->msg[4], program_header_length, 0);
> //      dprintk("%s: Copying Program header\n", __FUNCTION__);
>         copy_string(hw_buffer->msg, p_ca_message->msg, hw_offset, (buf_offset + asn_1_words), program_header_length);
>         buf_offset += program_header_length, hw_offset += program_header_length;
>         modify_4_bits(hw_buffer->msg, (hw_offset - 2));
>         if (state->type_flags & DST_TYPE_HAS_INC_COUNT) {       // workaround
>                 dprintk("%s: Probably an ASIC bug !!!\n", __FUNCTION__);
>                 debug_string(hw_buffer->msg, (hw_offset + program_header_length), 0);
>                 hw_buffer->msg[hw_offset - 1] += 1;
>         }
> 
> //      dprintk("%s: Program Header(HW), Count=[%d]", __FUNCTION__, count);
> //      debug_string(hw_buffer->msg, hw_offset, 0);
> 
>         program_info_length =  ((program_info_length | (p_ca_message->msg[buf_offset - 1] & 0x0f)) << 8) | p_ca_message->msg[buf_offset];
>         dprintk("%s: Program info length=[%02x]\n", __FUNCTION__, program_info_length);
>         if (program_info_length) {
> 
>                 count = copy_string(hw_buffer->msg, p_ca_message->msg, hw_offset, (buf_offset + 1), (program_info_length + 1) ); // copy next elem, not current
>                 buf_offset += count, hw_offset += count;
> //              dprintk("%s: Program level ", __FUNCTION__);
> //              debug_string(hw_buffer->msg, hw_offset, 0);
>         }
> 
>         buf_offset += 1;// hw_offset += 1;
>         for (i = buf_offset; i < length; i++) {
> //              dprintk("%s: Stream Header ", __FUNCTION__);
>                 count = copy_string(hw_buffer->msg, p_ca_message->msg, hw_offset, buf_offset, 5);
>                 modify_4_bits(hw_buffer->msg, (hw_offset + 3));
> 
>                 hw_offset += 5, buf_offset += 5, i += 4;
> //              debug_string(hw_buffer->msg, hw_offset, (hw_offset - 5));
>                 dprintk("%s: ES Info length bytes = [%02x %02x]\n", __FUNCTION__, p_ca_message->msg[buf_offset - 1], p_ca_message->msg[buf_offset]);
>                 es_info_length = 0;
>                 es_info_length = ((es_info_length | (p_ca_message->msg[buf_offset - 1] & 0x0f)) << 8) | p_ca_message->msg[buf_offset];
>                 dprintk("%s: ES info length=[%02x]\n", __FUNCTION__, es_info_length);
>                 if (es_info_length) {
>                         // copy descriptors @ STREAM level
>                         if (p_ca_message->msg[buf_offset + 2] == 0x09) {        // Copy CA descriptor only
>                                 copy_string(hw_buffer->msg, p_ca_message->msg, hw_offset, buf_offset, (es_info_length - 1));
>                                 dprintk("%s: Descriptors @ STREAM level...!!! \n", __FUNCTION__);
>                         }
>                 }
> 
>         }
>         hw_buffer->msg[length + dst_tag_length] = dst_check_sum(hw_buffer->msg, (length + dst_tag_length));
> //      dprintk("%s: Total length=[%d], Checksum=[%02x]\n", __FUNCTION__, (length + dst_tag_length), hw_buffer->msg[length + dst_tag_length]);
>         debug_string(hw_buffer->msg, (length + dst_tag_length + 1), 0); // dst tags also
>         write_to_8820(state, hw_buffer, (length + dst_tag_length + 1), reply);  // checksum
> 
>         return 0;
> }
> 
> 
> /*      Board supports CA PMT reply ?           */
> static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
> {
>         int ca_pmt_reply_test = 0;
> 
>         /*      Do test board                   */
>         /*      Not there yet but soon          */
> 
> 
>         /*      CA PMT Reply capable            */
>         if (ca_pmt_reply_test) {
>                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
>                         dprintk("%s: ca_set_pmt.. failed !\n", __FUNCTION__);
>                         return -1;
>                 }
> 
>         /*      Process CA PMT Reply            */
>         /*      will implement soon             */
>                 dprintk("%s: Not there yet\n", __FUNCTION__);
>         }
>         /*      CA PMT Reply not capable        */
>         if (!ca_pmt_reply_test) {
>                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
>                         dprintk("%s: ca_set_pmt.. failed !\n", __FUNCTION__);
>                         return -1;
>                 }
>                 if (verbose > 3)
>                         dprintk("%s: ca_set_pmt.. success !\n", __FUNCTION__);
>         /*      put a dummy message             */
> 
>         }
>         return 0;
> }
> 
> static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void *arg)
> {
>         int i = 0;
>         unsigned int ca_message_header_len;
> 
>         u32 command = 0;
>         struct ca_msg *hw_buffer;
> 
>         if ((hw_buffer = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
>                 dprintk("%s: Memory allocation failure\n", __FUNCTION__);
>                 return -ENOMEM;
>         }
>         if (verbose > 3)
>                 dprintk("%s\n", __FUNCTION__);
> 
>         if (copy_from_user(p_ca_message, (void *)arg, sizeof (struct ca_msg)))
>                 return -EFAULT;
> 
>         if (p_ca_message->msg) {
>                 ca_message_header_len = p_ca_message->length;   /*      Restore it back when you are done       */
>                 /*      EN50221 tag     */
>                 command = 0;
> 
>                 for (i = 0; i < 3; i++) {
>                         command = command | p_ca_message->msg[i];
>                         if (i < 2)
>                                 command = command << 8;
>                 }
>                 if (verbose > 3)
>                         dprintk("%s:Command=[0x%x]\n", __FUNCTION__, command);
> 
>                 switch (command) {
>                         case CA_PMT:
>                                 if (verbose > 3)
> //                                      dprintk("Command = SEND_CA_PMT\n");
>                                         dprintk("Command = SEND_CA_PMT\n");
> //                              if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) {
>                                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) {   // code simplification started
>                                         dprintk("%s: -->CA_PMT Failed !\n", __FUNCTION__);
>                                         return -1;
>                                 }
>                                 if (verbose > 3)
>                                         dprintk("%s: -->CA_PMT Success !\n", __FUNCTION__);
> //                              retval = dummy_set_pmt(state, p_ca_message, hw_buffer, 0, 0);
> 
>                                 break;
> 
>                         case CA_PMT_REPLY:
>                                 if (verbose > 3)
>                                         dprintk("Command = CA_PMT_REPLY\n");
>                                 /*      Have to handle the 2 basic types of cards here  */
>                                 if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
>                                         dprintk("%s: -->CA_PMT_REPLY Failed !\n", __FUNCTION__);
>                                         return -1;
>                                 }
>                                 if (verbose > 3)
>                                         dprintk("%s: -->CA_PMT_REPLY Success !\n", __FUNCTION__);
> 
>                                 /*      Certain boards do behave different ?            */
> //                              retval = ca_set_pmt(state, p_ca_message, hw_buffer, 1, 1);
> 
>                         case CA_APP_INFO_ENQUIRY:               // only for debugging
>                                 if (verbose > 3)
>                                         dprintk("%s: Getting Cam Application information\n", __FUNCTION__);
> 
>                                 if ((ca_get_app_info(state)) < 0) {
>                                         dprintk("%s: -->CA_APP_INFO_ENQUIRY Failed !\n", __FUNCTION__);
>                                         return -1;
>                                 }
>                                 if (verbose > 3)
>                                         dprintk("%s: -->CA_APP_INFO_ENQUIRY Success !\n", __FUNCTION__);
> 
>                                 break;
>                 }
>         }
>         return 0;
> }
> 
> static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
> {
>         struct dvb_device* dvbdev = (struct dvb_device*) file->private_data;
>         struct dst_state* state = (struct dst_state*) dvbdev->priv;
>         struct ca_slot_info *p_ca_slot_info;
>         struct ca_caps *p_ca_caps;
>         struct ca_msg *p_ca_message;
> 
>         if ((p_ca_message = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
>                 dprintk("%s: Memory allocation failure\n", __FUNCTION__);
>                 return -ENOMEM;
>         }
> 
>         if ((p_ca_slot_info = (struct ca_slot_info *) kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL)) == NULL) {
>                 dprintk("%s: Memory allocation failure\n", __FUNCTION__);
>                 return -ENOMEM;
>         }
> 
>         if ((p_ca_caps = (struct ca_caps *) kmalloc(sizeof (struct ca_caps), GFP_KERNEL)) == NULL) {
>                 dprintk("%s: Memory allocation failure\n", __FUNCTION__);
>                 return -ENOMEM;
>         }
> 
>         /*      We have now only the standard ioctl's, the driver is upposed to handle internals.       */
>         switch (cmd) {
>                 case CA_SEND_MSG:
>                         if (verbose > 1)
>                                 dprintk("%s: Sending message\n", __FUNCTION__);
>                         if ((ca_send_message(state, p_ca_message, arg)) < 0) {
>                                 dprintk("%s: -->CA_SEND_MSG Failed !\n", __FUNCTION__);
>                                 return -1;
>                         }
> 
>                         break;
> 
>                 case CA_GET_MSG:
>                         if (verbose > 1)
>                                 dprintk("%s: Getting message\n", __FUNCTION__);
>                         if ((ca_get_message(state, p_ca_message, arg)) < 0) {
>                                 dprintk("%s: -->CA_GET_MSG Failed !\n", __FUNCTION__);
>                                 return -1;
>                         }
>                         if (verbose > 1)
>                                 dprintk("%s: -->CA_GET_MSG Success !\n", __FUNCTION__);
> 
>                         break;
> 
>                 case CA_RESET:
>                         if (verbose > 1)
>                                 dprintk("%s: Resetting DST\n", __FUNCTION__);
>                         dst_error_bailout(state);
>                         msleep(4000);
> 
>                         break;
> 
>                 case CA_GET_SLOT_INFO:
>                         if (verbose > 1)
>                                 dprintk("%s: Getting Slot info\n", __FUNCTION__);
>                         if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
>                                 dprintk("%s: -->CA_GET_SLOT_INFO Failed !\n", __FUNCTION__);
>                                 return -1;
>                         }
>                         if (verbose > 1)
>                                 dprintk("%s: -->CA_GET_SLOT_INFO Success !\n", __FUNCTION__);
> 
>                         break;
> 
>                 case CA_GET_CAP:
>                         if (verbose > 1)
>                                 dprintk("%s: Getting Slot capabilities\n", __FUNCTION__);
>                         if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
>                                 dprintk("%s: -->CA_GET_CAP Failed !\n", __FUNCTION__);
>                                 return -1;
>                         }
>                         if (verbose > 1)
>                                 dprintk("%s: -->CA_GET_CAP Success !\n", __FUNCTION__);
> 
>                         break;
> 
>                 case CA_GET_DESCR_INFO:
>                         if (verbose > 1)
>                                 dprintk("%s: Getting descrambler description\n", __FUNCTION__);
>                         if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
>                                 dprintk("%s: -->CA_GET_DESCR_INFO Failed !\n", __FUNCTION__);
>                                 return -1;
>                         }
>                         if (verbose > 1)
>                                 dprintk("%s: -->CA_GET_DESCR_INFO Success !\n", __FUNCTION__);
> 
>                         break;
> 
>                 case CA_SET_DESCR:
>                         if (verbose > 1)
>                                 dprintk("%s: Setting descrambler\n", __FUNCTION__);
>                         if ((ca_set_slot_descr()) < 0) {
>                                 dprintk("%s: -->CA_SET_DESCR Failed !\n", __FUNCTION__);
>                                 return -1;
>                         }
>                         if (verbose > 1)
>                                 dprintk("%s: -->CA_SET_DESCR Success !\n", __FUNCTION__);
> 
>                         break;
> 
>                 case CA_SET_PID:
>                         if (verbose > 1)
>                                 dprintk("%s: Setting PID\n", __FUNCTION__);
>                         if ((ca_set_pid()) < 0) {
>                                 dprintk("%s: -->CA_SET_PID Failed !\n", __FUNCTION__);
>                                 return -1;
>                         }
>                         if (verbose > 1)
>                                 dprintk("%s: -->CA_SET_PID Success !\n", __FUNCTION__);
> 
>                 default:
>                         return -EOPNOTSUPP;
>                 };
> 
>         return 0;
> }
> 
> static int dst_ca_open(struct inode *inode, struct file *file)
> {
>         if (verbose > 4)
>                 dprintk("%s:Device opened [%p]\n", __FUNCTION__, file);
>         try_module_get(THIS_MODULE);
> 
>         return 0;
> }
> 
> static int dst_ca_release(struct inode *inode, struct file *file)
> {
>         if (verbose > 4)
>                 dprintk("%s:Device closed.\n", __FUNCTION__);
>         module_put(THIS_MODULE);
> 
>         return 0;
> }
> 
> static int dst_ca_read(struct file *file, char __user * buffer, size_t length, loff_t * offset)
> {
>         int bytes_read = 0;
> 
>         if (verbose > 4)
>                 dprintk("%s:Device read.\n", __FUNCTION__);
> 
>         return bytes_read;
> }
> 
> static int dst_ca_write(struct file *file, const char __user * buffer, size_t length, loff_t * offset)
> {
>         if (verbose > 4)
>                 dprintk("%s:Device write.\n", __FUNCTION__);
> 
>         return 0;
> }
> 
> static struct file_operations dst_ca_fops = {
>         .owner = THIS_MODULE,
>         .ioctl = (void *)dst_ca_ioctl,
>         .open = dst_ca_open,
>         .release = dst_ca_release,
>         .read = dst_ca_read,
>         .write = dst_ca_write
> };
> 
> static struct dvb_device dvbdev_ca = {
>         .priv = NULL,
>         .users = 1,
>         .readers = 1,
>         .writers = 1,
>         .fops = &dst_ca_fops
> };
> 
> int dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
> {
>         struct dvb_device *dvbdev;
>         if (verbose > 4)
>                 dprintk("%s:registering DST-CA device\n", __FUNCTION__);
>         dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst, DVB_DEVICE_CA);
>         return 0;
> }
> 
> EXPORT_SYMBOL(dst_ca_attach);
> 
> MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
> MODULE_AUTHOR("Manu Abraham");
> MODULE_LICENSE("GPL");
> 
> 
>




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