[PATCH] dvb: dst: remove unnecessary code
Manu Abraham [Fri, 9 Sep 2005 20:02:59 +0000 (13:02 -0700)]
Code Simplification: CA PMT object is not parsed in the driver anymore.

Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/media/dvb/bt8xx/dst_ca.c

index bfaacd5..d2e0b1c 100644 (file)
@@ -260,8 +260,6 @@ static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_s
 }
 
 
-
-
 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void *arg)
 {
        u8 i = 0;
@@ -298,10 +296,14 @@ static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message,
 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[2] = p_ca_message->msg[1];       /*      MSB     */
+               hw_buffer->msg[3] = p_ca_message->msg[2];       /*      LSB     */
+       } else {
+               if (length > 247) {
+                       dprintk("%s: Message too long ! *** Bailing Out *** !\n", __FUNCTION__);
+                       return -1;
+               }
+
                hw_buffer->msg[0] = (length & 0xff) + 7;
                hw_buffer->msg[1] = 0x40;
                hw_buffer->msg[2] = 0x03;
@@ -309,6 +311,11 @@ static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message,
                hw_buffer->msg[4] = 0x03;
                hw_buffer->msg[5] = length & 0xff;
                hw_buffer->msg[6] = 0x00;
+               /*
+                *      Need to compute length for EN50221 section 8.3.2, for the time being
+                *      assuming 8.3.2 is not applicable
+                */
+               memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
        }
        return 0;
 }
@@ -348,15 +355,6 @@ u32 asn_1_decode(u8 *asn_1_array)
        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;
@@ -369,95 +367,22 @@ static int debug_string(u8 *msg, u32 length, u32 offset)
        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 modify_4_bits(u8 *message, u32 pos)
-{
-       message[pos] &= 0x0f;
-
-       return 0;
-}
-
-
-
 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;
+       u32 length = 0;
+       u8 tag_length = 8;
 
        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
+       debug_string(&p_ca_message->msg[4], length, 0); /*      length is excluding tag & length        */
 
-       init_buffer(hw_buffer->msg, length);
+       memset(hw_buffer->msg, '\0', length);
        handle_dst_tag(state, p_ca_message, hw_buffer, length);
+       put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
 
-       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));
-               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
-                       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
+       debug_string(hw_buffer->msg, (length + tag_length), 0); /*      tags too        */
+       write_to_8820(state, hw_buffer, (length + tag_length), reply);
 
        return 0;
 }