kernel/drivers/media/common/b2c2/flexcop-hw-filter.c

   1 /*
   2  * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
   3  * flexcop-hw-filter.c - pid and mac address filtering and control functions
   4  * see flexcop.c for copyright information
   5  */
   6 #include "flexcop.h"
   7
   8 static void flexcop_rcv_data_ctrl(struct flexcop_device *fc, int onoff)
   9 {
  10         flexcop_set_ibi_value(ctrl_208, Rcv_Data_sig, onoff);
  11         deb_ts("rcv_data is now: '%s'\n", onoff ? "on" : "off");
  12 }
  13
  14 void flexcop_smc_ctrl(struct flexcop_device *fc, int onoff)
  15 {
  16         flexcop_set_ibi_value(ctrl_208, SMC_Enable_sig, onoff);
  17 }
  18
  19 static void flexcop_null_filter_ctrl(struct flexcop_device *fc, int onoff)
  20 {
  21         flexcop_set_ibi_value(ctrl_208, Null_filter_sig, onoff);
  22 }
  23
  24 void flexcop_set_mac_filter(struct flexcop_device *fc, u8 mac[6])
  25 {
  26         flexcop_ibi_value v418, v41c;
  27         v41c = fc->read_ibi_reg(fc, mac_address_41c);
  28
  29         v418.mac_address_418.MAC1 = mac[0];
  30         v418.mac_address_418.MAC2 = mac[1];
  31         v418.mac_address_418.MAC3 = mac[2];
  32         v418.mac_address_418.MAC6 = mac[3];
  33         v41c.mac_address_41c.MAC7 = mac[4];
  34         v41c.mac_address_41c.MAC8 = mac[5];
  35
  36         fc->write_ibi_reg(fc, mac_address_418, v418);
  37         fc->write_ibi_reg(fc, mac_address_41c, v41c);
  38 }
  39
  40 void flexcop_mac_filter_ctrl(struct flexcop_device *fc, int onoff)
  41 {
  42         flexcop_set_ibi_value(ctrl_208, MAC_filter_Mode_sig, onoff);
  43 }
  44
  45 static void flexcop_pid_group_filter(struct flexcop_device *fc,
  46                 u16 pid, u16 mask)
  47 {
  48         /* index_reg_310.extra_index_reg need to 0 or 7 to work */
  49         flexcop_ibi_value v30c;
  50         v30c.pid_filter_30c_ext_ind_0_7.Group_PID = pid;
  51         v30c.pid_filter_30c_ext_ind_0_7.Group_mask = mask;
  52         fc->write_ibi_reg(fc, pid_filter_30c, v30c);
  53 }
  54
  55 static void flexcop_pid_group_filter_ctrl(struct flexcop_device *fc, int onoff)
  56 {
  57         flexcop_set_ibi_value(ctrl_208, Mask_filter_sig, onoff);
  58 }
  59
  60 /* this fancy define reduces the code size of the quite similar PID controlling of
  61  * the first 6 PIDs
  62  */
  63
  64 #define pid_ctrl(vregname,field,enablefield,trans_field,transval) \
  65         flexcop_ibi_value vpid = fc->read_ibi_reg(fc, vregname), \
  66 v208 = fc->read_ibi_reg(fc, ctrl_208); \
  67 vpid.vregname.field = onoff ? pid : 0x1fff; \
  68 vpid.vregname.trans_field = transval; \
  69 v208.ctrl_208.enablefield = onoff; \
  70 fc->write_ibi_reg(fc, vregname, vpid); \
  71 fc->write_ibi_reg(fc, ctrl_208, v208);
  72
  73 static void flexcop_pid_Stream1_PID_ctrl(struct flexcop_device *fc,
  74                 u16 pid, int onoff)
  75 {
  76         pid_ctrl(pid_filter_300, Stream1_PID, Stream1_filter_sig,
  77                         Stream1_trans, 0);
  78 }
  79
  80 static void flexcop_pid_Stream2_PID_ctrl(struct flexcop_device *fc,
  81                 u16 pid, int onoff)
  82 {
  83         pid_ctrl(pid_filter_300, Stream2_PID, Stream2_filter_sig,
  84                         Stream2_trans, 0);
  85 }
  86
  87 static void flexcop_pid_PCR_PID_ctrl(struct flexcop_device *fc,
  88                 u16 pid, int onoff)
  89 {
  90         pid_ctrl(pid_filter_304, PCR_PID, PCR_filter_sig, PCR_trans, 0);
  91 }
  92
  93 static void flexcop_pid_PMT_PID_ctrl(struct flexcop_device *fc,
  94                 u16 pid, int onoff)
  95 {
  96         pid_ctrl(pid_filter_304, PMT_PID, PMT_filter_sig, PMT_trans, 0);
  97 }
  98
  99 static void flexcop_pid_EMM_PID_ctrl(struct flexcop_device *fc,
 100                 u16 pid, int onoff)
 101 {
 102         pid_ctrl(pid_filter_308, EMM_PID, EMM_filter_sig, EMM_trans, 0);
 103 }
 104
 105 static void flexcop_pid_ECM_PID_ctrl(struct flexcop_device *fc,
 106                 u16 pid, int onoff)
 107 {
 108         pid_ctrl(pid_filter_308, ECM_PID, ECM_filter_sig, ECM_trans, 0);
 109 }
 110
 111 static void flexcop_pid_control(struct flexcop_device *fc,
 112                 int index, u16 pid, int onoff)
 113 {
 114         if (pid == 0x2000)
 115                 return;
 116
 117         deb_ts("setting pid: %5d %04x at index %d '%s'\n",
 118                         pid, pid, index, onoff ? "on" : "off");
 119
 120         /* First 6 can be buggy - skip over them if option set */
 121         if (fc->skip_6_hw_pid_filter)
 122                 index += 6;
 123
 124         /* We could use bit magic here to reduce source code size.
 125          * I decided against it, but to use the real register names */
 126         switch (index) {
 127         case 0:
 128                 flexcop_pid_Stream1_PID_ctrl(fc, pid, onoff);
 129                 break;
 130         case 1:
 131                 flexcop_pid_Stream2_PID_ctrl(fc, pid, onoff);
 132                 break;
 133         case 2:
 134                 flexcop_pid_PCR_PID_ctrl(fc, pid, onoff);
 135                 break;
 136         case 3:
 137                 flexcop_pid_PMT_PID_ctrl(fc, pid, onoff);
 138                 break;
 139         case 4:
 140                 flexcop_pid_EMM_PID_ctrl(fc, pid, onoff);
 141                 break;
 142         case 5:
 143                 flexcop_pid_ECM_PID_ctrl(fc, pid, onoff);
 144                 break;
 145         default:
 146                 if (fc->has_32_hw_pid_filter && index < 38) {
 147                         flexcop_ibi_value vpid, vid;
 148
 149                         /* set the index */
 150                         vid = fc->read_ibi_reg(fc, index_reg_310);
 151                         vid.index_reg_310.index_reg = index - 6;
 152                         fc->write_ibi_reg(fc, index_reg_310, vid);
 153
 154                         vpid = fc->read_ibi_reg(fc, pid_n_reg_314);
 155                         vpid.pid_n_reg_314.PID = onoff ? pid : 0x1fff;
 156                         vpid.pid_n_reg_314.PID_enable_bit = onoff;
 157                         fc->write_ibi_reg(fc, pid_n_reg_314, vpid);
 158                 }
 159                 break;
 160         }
 161 }
 162
 163 static int flexcop_toggle_fullts_streaming(struct flexcop_device *fc, int onoff)
 164 {
 165         if (fc->fullts_streaming_state != onoff) {
 166                 deb_ts("%s full TS transfer\n",onoff ? "enabling" : "disabling");
 167                 flexcop_pid_group_filter(fc, 0, 0x1fe0 * (!onoff));
 168                 flexcop_pid_group_filter_ctrl(fc, onoff);
 169                 fc->fullts_streaming_state = onoff;
 170         }
 171         return 0;
 172 }
 173
 174 int flexcop_pid_feed_control(struct flexcop_device *fc,
 175                 struct dvb_demux_feed *dvbdmxfeed, int onoff)
 176 {
 177         int max_pid_filter = 6;
 178
 179         max_pid_filter -= 6 * fc->skip_6_hw_pid_filter;
 180         max_pid_filter += 32 * fc->has_32_hw_pid_filter;
 181
 182         fc->feedcount += onoff ? 1 : -1; /* the number of PIDs/Feed currently requested */
 183         if (dvbdmxfeed->index >= max_pid_filter)
 184                 fc->extra_feedcount += onoff ? 1 : -1;
 185
 186         /* toggle complete-TS-streaming when:
 187          * - pid_filtering is not enabled and it is the first or last feed requested
 188          * - pid_filtering is enabled,
 189          *   - but the number of requested feeds is exceeded
 190          *   - or the requested pid is 0x2000 */
 191
 192         if (!fc->pid_filtering && fc->feedcount == onoff)
 193                 flexcop_toggle_fullts_streaming(fc, onoff);
 194
 195         if (fc->pid_filtering) {
 196                 flexcop_pid_control \
 197                         (fc, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);
 198
 199                 if (fc->extra_feedcount > 0)
 200                         flexcop_toggle_fullts_streaming(fc, 1);
 201                 else if (dvbdmxfeed->pid == 0x2000)
 202                         flexcop_toggle_fullts_streaming(fc, onoff);
 203                 else
 204                         flexcop_toggle_fullts_streaming(fc, 0);
 205         }
 206
 207         /* if it was the first or last feed request change the stream-status */
 208         if (fc->feedcount == onoff) {
 209                 flexcop_rcv_data_ctrl(fc, onoff);
 210                 if (fc->stream_control) /* device specific stream control */
 211                         fc->stream_control(fc, onoff);
 212
 213                 /* feeding stopped -> reset the flexcop filter*/
 214                 if (onoff == 0) {
 215                         flexcop_reset_block_300(fc);
 216                         flexcop_hw_filter_init(fc);
 217                 }
 218         }
 219         return 0;
 220 }
 221 EXPORT_SYMBOL(flexcop_pid_feed_control);
 222
 223 void flexcop_hw_filter_init(struct flexcop_device *fc)
 224 {
 225         int i;
 226         flexcop_ibi_value v;
 227         int max_pid_filter = 6;
 228
 229         max_pid_filter -= 6 * fc->skip_6_hw_pid_filter;
 230         max_pid_filter += 32 * fc->has_32_hw_pid_filter;
 231
 232         for (i = 0; i < max_pid_filter; i++)
 233                 flexcop_pid_control(fc, i, 0x1fff, 0);
 234
 235         flexcop_pid_group_filter(fc, 0, 0x1fe0);
 236         flexcop_pid_group_filter_ctrl(fc, 0);
 237
 238         v = fc->read_ibi_reg(fc, pid_filter_308);
 239         v.pid_filter_308.EMM_filter_4 = 1;
 240         v.pid_filter_308.EMM_filter_6 = 0;
 241         fc->write_ibi_reg(fc, pid_filter_308, v);
 242
 243         flexcop_null_filter_ctrl(fc, 1);
 244 }