1
2
3
4
5
6
7
8
9
10
11
12
13
14
15#include <linux/videodev2.h>
16#include <linux/i2c.h>
17#include <media/v4l2-common.h>
18#include <media/drv-intf/cx25840.h>
19
20#include "cx25840-core.h"
21
22static int odd_parity(u8 c)
23{
24 c ^= (c >> 4);
25 c ^= (c >> 2);
26 c ^= (c >> 1);
27
28 return c & 1;
29}
30
31static int decode_vps(u8 * dst, u8 * p)
32{
33 static const u8 biphase_tbl[] = {
34 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
35 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
36 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
37 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
38 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
39 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
40 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
41 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
42 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
43 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
44 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87,
45 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3,
46 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85,
47 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1,
48 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
49 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
50 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
51 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
52 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86,
53 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2,
54 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84,
55 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0,
56 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
57 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
58 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
59 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
60 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
61 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
62 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
63 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
64 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
65 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
66 };
67
68 u8 c, err = 0;
69 int i;
70
71 for (i = 0; i < 2 * 13; i += 2) {
72 err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]];
73 c = (biphase_tbl[p[i + 1]] & 0xf) |
74 ((biphase_tbl[p[i]] & 0xf) << 4);
75 dst[i / 2] = c;
76 }
77
78 return err & 0xf0;
79}
80
81int cx25840_g_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi)
82{
83 struct i2c_client *client = v4l2_get_subdevdata(sd);
84 struct cx25840_state *state = to_state(sd);
85 static const u16 lcr2vbi[] = {
86 0, V4L2_SLICED_TELETEXT_B, 0,
87 0, V4L2_SLICED_WSS_625, 0,
88 V4L2_SLICED_CAPTION_525,
89 0, 0, V4L2_SLICED_VPS, 0, 0,
90 0, 0, 0, 0
91 };
92 int is_pal = !(state->std & V4L2_STD_525_60);
93 int i;
94
95 memset(svbi->service_lines, 0, sizeof(svbi->service_lines));
96 svbi->service_set = 0;
97
98 if ((cx25840_read(client, 0x404) & 0x10) == 0)
99 return 0;
100
101 if (is_pal) {
102 for (i = 7; i <= 23; i++) {
103 u8 v = cx25840_read(client,
104 state->vbi_regs_offset + 0x424 + i - 7);
105
106 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
107 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
108 svbi->service_set |= svbi->service_lines[0][i] |
109 svbi->service_lines[1][i];
110 }
111 } else {
112 for (i = 10; i <= 21; i++) {
113 u8 v = cx25840_read(client,
114 state->vbi_regs_offset + 0x424 + i - 10);
115
116 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
117 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
118 svbi->service_set |= svbi->service_lines[0][i] |
119 svbi->service_lines[1][i];
120 }
121 }
122 return 0;
123}
124
125int cx25840_s_raw_fmt(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt)
126{
127 struct i2c_client *client = v4l2_get_subdevdata(sd);
128 struct cx25840_state *state = to_state(sd);
129 int is_pal = !(state->std & V4L2_STD_525_60);
130 int vbi_offset = is_pal ? 1 : 0;
131
132
133 cx25840_std_setup(client);
134
135
136 if (is_cx23888(state))
137 cx25840_write(client, 0x54f, vbi_offset);
138 else
139 cx25840_write(client, 0x47f, vbi_offset);
140 cx25840_write(client, 0x404, 0x2e);
141 return 0;
142}
143
144int cx25840_s_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi)
145{
146 struct i2c_client *client = v4l2_get_subdevdata(sd);
147 struct cx25840_state *state = to_state(sd);
148 int is_pal = !(state->std & V4L2_STD_525_60);
149 int vbi_offset = is_pal ? 1 : 0;
150 int i, x;
151 u8 lcr[24];
152
153 for (x = 0; x <= 23; x++)
154 lcr[x] = 0x00;
155
156
157 cx25840_std_setup(client);
158
159
160 cx25840_write(client, 0x404, 0x32);
161 cx25840_write(client, 0x406, 0x13);
162 if (is_cx23888(state))
163 cx25840_write(client, 0x54f, vbi_offset);
164 else
165 cx25840_write(client, 0x47f, vbi_offset);
166
167 if (is_pal) {
168 for (i = 0; i <= 6; i++)
169 svbi->service_lines[0][i] =
170 svbi->service_lines[1][i] = 0;
171 } else {
172 for (i = 0; i <= 9; i++)
173 svbi->service_lines[0][i] =
174 svbi->service_lines[1][i] = 0;
175
176 for (i = 22; i <= 23; i++)
177 svbi->service_lines[0][i] =
178 svbi->service_lines[1][i] = 0;
179 }
180
181 for (i = 7; i <= 23; i++) {
182 for (x = 0; x <= 1; x++) {
183 switch (svbi->service_lines[1-x][i]) {
184 case V4L2_SLICED_TELETEXT_B:
185 lcr[i] |= 1 << (4 * x);
186 break;
187 case V4L2_SLICED_WSS_625:
188 lcr[i] |= 4 << (4 * x);
189 break;
190 case V4L2_SLICED_CAPTION_525:
191 lcr[i] |= 6 << (4 * x);
192 break;
193 case V4L2_SLICED_VPS:
194 lcr[i] |= 9 << (4 * x);
195 break;
196 }
197 }
198 }
199
200 if (is_pal) {
201 for (x = 1, i = state->vbi_regs_offset + 0x424;
202 i <= state->vbi_regs_offset + 0x434; i++, x++)
203 cx25840_write(client, i, lcr[6 + x]);
204 } else {
205 for (x = 1, i = state->vbi_regs_offset + 0x424;
206 i <= state->vbi_regs_offset + 0x430; i++, x++)
207 cx25840_write(client, i, lcr[9 + x]);
208 for (i = state->vbi_regs_offset + 0x431;
209 i <= state->vbi_regs_offset + 0x434; i++)
210 cx25840_write(client, i, 0);
211 }
212
213 cx25840_write(client, state->vbi_regs_offset + 0x43c, 0x16);
214 if (is_cx23888(state))
215 cx25840_write(client, 0x428, is_pal ? 0x2a : 0x22);
216 else
217 cx25840_write(client, 0x474, is_pal ? 0x2a : 0x22);
218 return 0;
219}
220
221int cx25840_decode_vbi_line(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi)
222{
223 struct cx25840_state *state = to_state(sd);
224 u8 *p = vbi->p;
225 int id1, id2, l, err = 0;
226
227 if (p[0] || p[1] != 0xff || p[2] != 0xff ||
228 (p[3] != 0x55 && p[3] != 0x91)) {
229 vbi->line = vbi->type = 0;
230 return 0;
231 }
232
233 p += 4;
234 id1 = p[-1];
235 id2 = p[0] & 0xf;
236 l = p[2] & 0x3f;
237 l += state->vbi_line_offset;
238 p += 4;
239
240 switch (id2) {
241 case 1:
242 id2 = V4L2_SLICED_TELETEXT_B;
243 break;
244 case 4:
245 id2 = V4L2_SLICED_WSS_625;
246 break;
247 case 6:
248 id2 = V4L2_SLICED_CAPTION_525;
249 err = !odd_parity(p[0]) || !odd_parity(p[1]);
250 break;
251 case 9:
252 id2 = V4L2_SLICED_VPS;
253 if (decode_vps(p, p) != 0)
254 err = 1;
255 break;
256 default:
257 id2 = 0;
258 err = 1;
259 break;
260 }
261
262 vbi->type = err ? 0 : id2;
263 vbi->line = err ? 0 : l;
264 vbi->is_second_field = err ? 0 : (id1 == 0x55);
265 vbi->p = p;
266 return 0;
267}
268
