1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
4 * flexcop-hw-filter.c - pid and mac address filtering and control functions
5 * see flexcop.c for copyright information
6 */
7#include "flexcop.h"
8
9static void flexcop_rcv_data_ctrl(struct flexcop_device *fc, int onoff)
10{
11 flexcop_set_ibi_value(ctrl_208, Rcv_Data_sig, onoff);
12 deb_ts("rcv_data is now: '%s'\n", onoff ? "on" : "off");
13}
14
15void flexcop_smc_ctrl(struct flexcop_device *fc, int onoff)
16{
17 flexcop_set_ibi_value(ctrl_208, SMC_Enable_sig, onoff);
18}
19
20static void flexcop_null_filter_ctrl(struct flexcop_device *fc, int onoff)
21{
22 flexcop_set_ibi_value(ctrl_208, Null_filter_sig, onoff);
23}
24
25void flexcop_set_mac_filter(struct flexcop_device *fc, u8 mac[6])
26{
27 flexcop_ibi_value v418, v41c;
28 v41c = fc->read_ibi_reg(fc, mac_address_41c);
29
30 v418.mac_address_418.MAC1 = mac[0];
31 v418.mac_address_418.MAC2 = mac[1];
32 v418.mac_address_418.MAC3 = mac[2];
33 v418.mac_address_418.MAC6 = mac[3];
34 v41c.mac_address_41c.MAC7 = mac[4];
35 v41c.mac_address_41c.MAC8 = mac[5];
36
37 fc->write_ibi_reg(fc, mac_address_418, v418);
38 fc->write_ibi_reg(fc, mac_address_41c, v41c);
39}
40
41void flexcop_mac_filter_ctrl(struct flexcop_device *fc, int onoff)
42{
43 flexcop_set_ibi_value(ctrl_208, MAC_filter_Mode_sig, onoff);
44}
45
46static void flexcop_pid_group_filter(struct flexcop_device *fc,
47 u16 pid, u16 mask)
48{
49 /* index_reg_310.extra_index_reg need to 0 or 7 to work */
50 flexcop_ibi_value v30c;
51 v30c.pid_filter_30c_ext_ind_0_7.Group_PID = pid;
52 v30c.pid_filter_30c_ext_ind_0_7.Group_mask = mask;
53 fc->write_ibi_reg(fc, pid_filter_30c, v30c);
54}
55
56static void flexcop_pid_group_filter_ctrl(struct flexcop_device *fc, int onoff)
57{
58 flexcop_set_ibi_value(ctrl_208, Mask_filter_sig, onoff);
59}
60
61/* this fancy define reduces the code size of the quite similar PID controlling of
62 * the first 6 PIDs
63 */
64
65#define pid_ctrl(vregname,field,enablefield,trans_field,transval) \
66 flexcop_ibi_value vpid = fc->read_ibi_reg(fc, vregname), \
67v208 = fc->read_ibi_reg(fc, ctrl_208); \
68vpid.vregname.field = onoff ? pid : 0x1fff; \
69vpid.vregname.trans_field = transval; \
70v208.ctrl_208.enablefield = onoff; \
71fc->write_ibi_reg(fc, vregname, vpid); \
72fc->write_ibi_reg(fc, ctrl_208, v208)
73
74static void flexcop_pid_Stream1_PID_ctrl(struct flexcop_device *fc,
75 u16 pid, int onoff)
76{
77 pid_ctrl(pid_filter_300, Stream1_PID, Stream1_filter_sig,
78 Stream1_trans, 0);
79}
80
81static void flexcop_pid_Stream2_PID_ctrl(struct flexcop_device *fc,
82 u16 pid, int onoff)
83{
84 pid_ctrl(pid_filter_300, Stream2_PID, Stream2_filter_sig,
85 Stream2_trans, 0);
86}
87
88static void flexcop_pid_PCR_PID_ctrl(struct flexcop_device *fc,
89 u16 pid, int onoff)
90{
91 pid_ctrl(pid_filter_304, PCR_PID, PCR_filter_sig, PCR_trans, 0);
92}
93
94static void flexcop_pid_PMT_PID_ctrl(struct flexcop_device *fc,
95 u16 pid, int onoff)
96{
97 pid_ctrl(pid_filter_304, PMT_PID, PMT_filter_sig, PMT_trans, 0);
98}
99
100static void flexcop_pid_EMM_PID_ctrl(struct flexcop_device *fc,
101 u16 pid, int onoff)
102{
103 pid_ctrl(pid_filter_308, EMM_PID, EMM_filter_sig, EMM_trans, 0);
104}
105
106static void flexcop_pid_ECM_PID_ctrl(struct flexcop_device *fc,
107 u16 pid, int onoff)
108{
109 pid_ctrl(pid_filter_308, ECM_PID, ECM_filter_sig, ECM_trans, 0);
110}
111
112static void flexcop_pid_control(struct flexcop_device *fc,
113 int index, u16 pid, int onoff)
114{
115 if (pid == 0x2000)
116 return;
117
118 deb_ts("setting pid: %5d %04x at index %d '%s'\n",
119 pid, pid, index, onoff ? "on" : "off");
120
121 /* First 6 can be buggy - skip over them if option set */
122 if (fc->skip_6_hw_pid_filter)
123 index += 6;
124
125 /* We could use bit magic here to reduce source code size.
126 * I decided against it, but to use the real register names */
127 switch (index) {
128 case 0:
129 flexcop_pid_Stream1_PID_ctrl(fc, pid, onoff);
130 break;
131 case 1:
132 flexcop_pid_Stream2_PID_ctrl(fc, pid, onoff);
133 break;
134 case 2:
135 flexcop_pid_PCR_PID_ctrl(fc, pid, onoff);
136 break;
137 case 3:
138 flexcop_pid_PMT_PID_ctrl(fc, pid, onoff);
139 break;
140 case 4:
141 flexcop_pid_EMM_PID_ctrl(fc, pid, onoff);
142 break;
143 case 5:
144 flexcop_pid_ECM_PID_ctrl(fc, pid, onoff);
145 break;
146 default:
147 if (fc->has_32_hw_pid_filter && index < 38) {
148 flexcop_ibi_value vpid, vid;
149
150 /* set the index */
151 vid = fc->read_ibi_reg(fc, index_reg_310);
152 vid.index_reg_310.index_reg = index - 6;
153 fc->write_ibi_reg(fc, index_reg_310, vid);
154
155 vpid = fc->read_ibi_reg(fc, pid_n_reg_314);
156 vpid.pid_n_reg_314.PID = onoff ? pid : 0x1fff;
157 vpid.pid_n_reg_314.PID_enable_bit = onoff;
158 fc->write_ibi_reg(fc, pid_n_reg_314, vpid);
159 }
160 break;
161 }
162}
163
164static int flexcop_toggle_fullts_streaming(struct flexcop_device *fc, int onoff)
165{
166 if (fc->fullts_streaming_state != onoff) {
167 deb_ts("%s full TS transfer\n",onoff ? "enabling" : "disabling");
168 flexcop_pid_group_filter(fc, pid: 0, mask: 0x1fe0 * (!onoff));
169 flexcop_pid_group_filter_ctrl(fc, onoff);
170 fc->fullts_streaming_state = onoff;
171 }
172 return 0;
173}
174
175int flexcop_pid_feed_control(struct flexcop_device *fc,
176 struct dvb_demux_feed *dvbdmxfeed, int onoff)
177{
178 int max_pid_filter = 6;
179
180 max_pid_filter -= 6 * fc->skip_6_hw_pid_filter;
181 max_pid_filter += 32 * fc->has_32_hw_pid_filter;
182
183 fc->feedcount += onoff ? 1 : -1; /* the number of PIDs/Feed currently requested */
184 if (dvbdmxfeed->index >= max_pid_filter)
185 fc->extra_feedcount += onoff ? 1 : -1;
186
187 /* toggle complete-TS-streaming when:
188 * - pid_filtering is not enabled and it is the first or last feed requested
189 * - pid_filtering is enabled,
190 * - but the number of requested feeds is exceeded
191 * - or the requested pid is 0x2000 */
192
193 if (!fc->pid_filtering && fc->feedcount == onoff)
194 flexcop_toggle_fullts_streaming(fc, onoff);
195
196 if (fc->pid_filtering) {
197 flexcop_pid_control \
198 (fc, index: dvbdmxfeed->index, pid: dvbdmxfeed->pid, onoff);
199
200 if (fc->extra_feedcount > 0)
201 flexcop_toggle_fullts_streaming(fc, onoff: 1);
202 else if (dvbdmxfeed->pid == 0x2000)
203 flexcop_toggle_fullts_streaming(fc, onoff);
204 else
205 flexcop_toggle_fullts_streaming(fc, onoff: 0);
206 }
207
208 /* if it was the first or last feed request change the stream-status */
209 if (fc->feedcount == onoff) {
210 flexcop_rcv_data_ctrl(fc, onoff);
211 if (fc->stream_control) /* device specific stream control */
212 fc->stream_control(fc, onoff);
213
214 /* feeding stopped -> reset the flexcop filter*/
215 if (onoff == 0) {
216 flexcop_reset_block_300(fc);
217 flexcop_hw_filter_init(fc);
218 }
219 }
220 return 0;
221}
222EXPORT_SYMBOL(flexcop_pid_feed_control);
223
224void flexcop_hw_filter_init(struct flexcop_device *fc)
225{
226 int i;
227 flexcop_ibi_value v;
228 int max_pid_filter = 6;
229
230 max_pid_filter -= 6 * fc->skip_6_hw_pid_filter;
231 max_pid_filter += 32 * fc->has_32_hw_pid_filter;
232
233 for (i = 0; i < max_pid_filter; i++)
234 flexcop_pid_control(fc, index: i, pid: 0x1fff, onoff: 0);
235
236 flexcop_pid_group_filter(fc, pid: 0, mask: 0x1fe0);
237 flexcop_pid_group_filter_ctrl(fc, onoff: 0);
238
239 v = fc->read_ibi_reg(fc, pid_filter_308);
240 v.pid_filter_308.EMM_filter_4 = 1;
241 v.pid_filter_308.EMM_filter_6 = 0;
242 fc->write_ibi_reg(fc, pid_filter_308, v);
243
244 flexcop_null_filter_ctrl(fc, onoff: 1);
245}
246

source code of linux/drivers/media/common/b2c2/flexcop-hw-filter.c