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         /* We could use bit magic here to reduce source code size.
 121          * I decided against it, but to use the real register names */
 122         switch (index) {
 123         case 0:
 124                 flexcop_pid_Stream1_PID_ctrl(fc, pid, onoff);
 125                 break;
 126         case 1:
 127                 flexcop_pid_Stream2_PID_ctrl(fc, pid, onoff);
 128                 break;
 129         case 2:
 130                 flexcop_pid_PCR_PID_ctrl(fc, pid, onoff);
 131                 break;
 132         case 3:
 133                 flexcop_pid_PMT_PID_ctrl(fc, pid, onoff);
 134                 break;
 135         case 4:
 136                 flexcop_pid_EMM_PID_ctrl(fc, pid, onoff);
 137                 break;
 138         case 5:
 139                 flexcop_pid_ECM_PID_ctrl(fc, pid, onoff);
 140                 break;
 141         default:
 142                 if (fc->has_32_hw_pid_filter && index < 38) {
 143                         flexcop_ibi_value vpid, vid;
 144
 145                         /* set the index */
 146                         vid = fc->read_ibi_reg(fc, index_reg_310);
 147                         vid.index_reg_310.index_reg = index - 6;
 148                         fc->write_ibi_reg(fc, index_reg_310, vid);
 149
 150                         vpid = fc->read_ibi_reg(fc, pid_n_reg_314);
 151                         vpid.pid_n_reg_314.PID = onoff ? pid : 0x1fff;
 152                         vpid.pid_n_reg_314.PID_enable_bit = onoff;
 153                         fc->write_ibi_reg(fc, pid_n_reg_314, vpid);
 154                 }
 155                 break;
 156         }
 157 }
 158
 159 static int flexcop_toggle_fullts_streaming(struct flexcop_device *fc, int onoff)
 160 {
 161         if (fc->fullts_streaming_state != onoff) {
 162                 deb_ts("%s full TS transfer\n",onoff ? "enabling" : "disabling");
 163                 flexcop_pid_group_filter(fc, 0, 0x1fe0 * (!onoff));
 164                 flexcop_pid_group_filter_ctrl(fc, onoff);
 165                 fc->fullts_streaming_state = onoff;
 166         }
 167         return 0;
 168 }
 169
 170 int flexcop_pid_feed_control(struct flexcop_device *fc,
 171                 struct dvb_demux_feed *dvbdmxfeed, int onoff)
 172 {
 173         int max_pid_filter = 6 + fc->has_32_hw_pid_filter*32;
 174
 175         fc->feedcount += onoff ? 1 : -1; /* the number of PIDs/Feed currently requested */
 176         if (dvbdmxfeed->index >= max_pid_filter)
 177                 fc->extra_feedcount += onoff ? 1 : -1;
 178
 179         /* toggle complete-TS-streaming when:
 180          * - pid_filtering is not enabled and it is the first or last feed requested
 181          * - pid_filtering is enabled,
 182          *   - but the number of requested feeds is exceeded
 183          *   - or the requested pid is 0x2000 */
 184
 185         if (!fc->pid_filtering && fc->feedcount == onoff)
 186                 flexcop_toggle_fullts_streaming(fc, onoff);
 187
 188         if (fc->pid_filtering) {
 189                 flexcop_pid_control \
 190                         (fc, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);
 191
 192                 if (fc->extra_feedcount > 0)
 193                         flexcop_toggle_fullts_streaming(fc, 1);
 194                 else if (dvbdmxfeed->pid == 0x2000)
 195                         flexcop_toggle_fullts_streaming(fc, onoff);
 196                 else
 197                         flexcop_toggle_fullts_streaming(fc, 0);
 198         }
 199
 200         /* if it was the first or last feed request change the stream-status */
 201         if (fc->feedcount == onoff) {
 202                 flexcop_rcv_data_ctrl(fc, onoff);
 203                 if (fc->stream_control) /* device specific stream control */
 204                         fc->stream_control(fc, onoff);
 205
 206                 /* feeding stopped -> reset the flexcop filter*/
 207                 if (onoff == 0) {
 208                         flexcop_reset_block_300(fc);
 209                         flexcop_hw_filter_init(fc);
 210                 }
 211         }
 212         return 0;
 213 }
 214 EXPORT_SYMBOL(flexcop_pid_feed_control);
 215
 216 void flexcop_hw_filter_init(struct flexcop_device *fc)
 217 {
 218         int i;
 219         flexcop_ibi_value v;
 220         for (i = 0; i < 6 + 32*fc->has_32_hw_pid_filter; i++)
 221                 flexcop_pid_control(fc, i, 0x1fff, 0);
 222
 223         flexcop_pid_group_filter(fc, 0, 0x1fe0);
 224         flexcop_pid_group_filter_ctrl(fc, 0);
 225
 226         v = fc->read_ibi_reg(fc, pid_filter_308);
 227         v.pid_filter_308.EMM_filter_4 = 1;
 228         v.pid_filter_308.EMM_filter_6 = 0;
 229         fc->write_ibi_reg(fc, pid_filter_308, v);
 230
 231         flexcop_null_filter_ctrl(fc, 1);
 232 }