1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* cx25840 VBI functions |
3 | */ |
4 | |
5 | |
6 | #include <linux/videodev2.h> |
7 | #include <linux/i2c.h> |
8 | #include <media/v4l2-common.h> |
9 | #include <media/drv-intf/cx25840.h> |
10 | |
11 | #include "cx25840-core.h" |
12 | |
13 | static int odd_parity(u8 c) |
14 | { |
15 | c ^= (c >> 4); |
16 | c ^= (c >> 2); |
17 | c ^= (c >> 1); |
18 | |
19 | return c & 1; |
20 | } |
21 | |
22 | static int decode_vps(u8 * dst, u8 * p) |
23 | { |
24 | static const u8 biphase_tbl[] = { |
25 | 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
26 | 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
27 | 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, |
28 | 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, |
29 | 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, |
30 | 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, |
31 | 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
32 | 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
33 | 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, |
34 | 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, |
35 | 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87, |
36 | 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3, |
37 | 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85, |
38 | 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1, |
39 | 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, |
40 | 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, |
41 | 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, |
42 | 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, |
43 | 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86, |
44 | 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2, |
45 | 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84, |
46 | 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0, |
47 | 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, |
48 | 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, |
49 | 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
50 | 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
51 | 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, |
52 | 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, |
53 | 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, |
54 | 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, |
55 | 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
56 | 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
57 | }; |
58 | |
59 | u8 c, err = 0; |
60 | int i; |
61 | |
62 | for (i = 0; i < 2 * 13; i += 2) { |
63 | err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]]; |
64 | c = (biphase_tbl[p[i + 1]] & 0xf) | |
65 | ((biphase_tbl[p[i]] & 0xf) << 4); |
66 | dst[i / 2] = c; |
67 | } |
68 | |
69 | return err & 0xf0; |
70 | } |
71 | |
72 | int cx25840_g_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi) |
73 | { |
74 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
75 | struct cx25840_state *state = to_state(sd); |
76 | static const u16 lcr2vbi[] = { |
77 | 0, V4L2_SLICED_TELETEXT_B, 0, /* 1 */ |
78 | 0, V4L2_SLICED_WSS_625, 0, /* 4 */ |
79 | V4L2_SLICED_CAPTION_525, /* 6 */ |
80 | 0, 0, V4L2_SLICED_VPS, 0, 0, /* 9 */ |
81 | 0, 0, 0, 0 |
82 | }; |
83 | int is_pal = !(state->std & V4L2_STD_525_60); |
84 | int i; |
85 | |
86 | memset(svbi->service_lines, 0, sizeof(svbi->service_lines)); |
87 | svbi->service_set = 0; |
88 | /* we're done if raw VBI is active */ |
89 | /* TODO: this will have to be changed for generic_mode VBI */ |
90 | if ((cx25840_read(client, addr: 0x404) & 0x10) == 0) |
91 | return 0; |
92 | |
93 | if (is_pal) { |
94 | for (i = 7; i <= 23; i++) { |
95 | u8 v = cx25840_read(client, |
96 | addr: state->vbi_regs_offset + 0x424 + i - 7); |
97 | |
98 | svbi->service_lines[0][i] = lcr2vbi[v >> 4]; |
99 | svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; |
100 | svbi->service_set |= svbi->service_lines[0][i] | |
101 | svbi->service_lines[1][i]; |
102 | } |
103 | } else { |
104 | for (i = 10; i <= 21; i++) { |
105 | u8 v = cx25840_read(client, |
106 | addr: state->vbi_regs_offset + 0x424 + i - 10); |
107 | |
108 | svbi->service_lines[0][i] = lcr2vbi[v >> 4]; |
109 | svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; |
110 | svbi->service_set |= svbi->service_lines[0][i] | |
111 | svbi->service_lines[1][i]; |
112 | } |
113 | } |
114 | return 0; |
115 | } |
116 | |
117 | int cx25840_s_raw_fmt(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt) |
118 | { |
119 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
120 | struct cx25840_state *state = to_state(sd); |
121 | int is_pal = !(state->std & V4L2_STD_525_60); |
122 | int vbi_offset = is_pal ? 1 : 0; |
123 | |
124 | /* Setup standard */ |
125 | cx25840_std_setup(client); |
126 | |
127 | /* VBI Offset */ |
128 | if (is_cx23888(state)) |
129 | cx25840_write(client, addr: 0x54f, value: vbi_offset); |
130 | else |
131 | cx25840_write(client, addr: 0x47f, value: vbi_offset); |
132 | /* TODO: this will have to be changed for generic_mode VBI */ |
133 | cx25840_write(client, addr: 0x404, value: 0x2e); |
134 | return 0; |
135 | } |
136 | |
137 | int cx25840_s_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi) |
138 | { |
139 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
140 | struct cx25840_state *state = to_state(sd); |
141 | int is_pal = !(state->std & V4L2_STD_525_60); |
142 | int vbi_offset = is_pal ? 1 : 0; |
143 | int i, x; |
144 | u8 lcr[24]; |
145 | |
146 | for (x = 0; x <= 23; x++) |
147 | lcr[x] = 0x00; |
148 | |
149 | /* Setup standard */ |
150 | cx25840_std_setup(client); |
151 | |
152 | /* Sliced VBI */ |
153 | /* TODO: this will have to be changed for generic_mode VBI */ |
154 | cx25840_write(client, addr: 0x404, value: 0x32); /* Ancillary data */ |
155 | cx25840_write(client, addr: 0x406, value: 0x13); |
156 | if (is_cx23888(state)) |
157 | cx25840_write(client, addr: 0x54f, value: vbi_offset); |
158 | else |
159 | cx25840_write(client, addr: 0x47f, value: vbi_offset); |
160 | |
161 | if (is_pal) { |
162 | for (i = 0; i <= 6; i++) |
163 | svbi->service_lines[0][i] = |
164 | svbi->service_lines[1][i] = 0; |
165 | } else { |
166 | for (i = 0; i <= 9; i++) |
167 | svbi->service_lines[0][i] = |
168 | svbi->service_lines[1][i] = 0; |
169 | |
170 | for (i = 22; i <= 23; i++) |
171 | svbi->service_lines[0][i] = |
172 | svbi->service_lines[1][i] = 0; |
173 | } |
174 | |
175 | for (i = 7; i <= 23; i++) { |
176 | for (x = 0; x <= 1; x++) { |
177 | switch (svbi->service_lines[1-x][i]) { |
178 | case V4L2_SLICED_TELETEXT_B: |
179 | lcr[i] |= 1 << (4 * x); |
180 | break; |
181 | case V4L2_SLICED_WSS_625: |
182 | lcr[i] |= 4 << (4 * x); |
183 | break; |
184 | case V4L2_SLICED_CAPTION_525: |
185 | lcr[i] |= 6 << (4 * x); |
186 | break; |
187 | case V4L2_SLICED_VPS: |
188 | lcr[i] |= 9 << (4 * x); |
189 | break; |
190 | } |
191 | } |
192 | } |
193 | |
194 | if (is_pal) { |
195 | for (x = 1, i = state->vbi_regs_offset + 0x424; |
196 | i <= state->vbi_regs_offset + 0x434; i++, x++) |
197 | cx25840_write(client, addr: i, value: lcr[6 + x]); |
198 | } else { |
199 | for (x = 1, i = state->vbi_regs_offset + 0x424; |
200 | i <= state->vbi_regs_offset + 0x430; i++, x++) |
201 | cx25840_write(client, addr: i, value: lcr[9 + x]); |
202 | for (i = state->vbi_regs_offset + 0x431; |
203 | i <= state->vbi_regs_offset + 0x434; i++) |
204 | cx25840_write(client, addr: i, value: 0); |
205 | } |
206 | |
207 | cx25840_write(client, addr: state->vbi_regs_offset + 0x43c, value: 0x16); |
208 | /* TODO: this will have to be changed for generic_mode VBI */ |
209 | if (is_cx23888(state)) |
210 | cx25840_write(client, addr: 0x428, value: is_pal ? 0x2a : 0x22); |
211 | else |
212 | cx25840_write(client, addr: 0x474, value: is_pal ? 0x2a : 0x22); |
213 | return 0; |
214 | } |
215 | |
216 | int cx25840_decode_vbi_line(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi) |
217 | { |
218 | struct cx25840_state *state = to_state(sd); |
219 | u8 *p = vbi->p; |
220 | int id1, id2, l, err = 0; |
221 | |
222 | if (p[0] || p[1] != 0xff || p[2] != 0xff || |
223 | (p[3] != 0x55 && p[3] != 0x91)) { |
224 | vbi->line = vbi->type = 0; |
225 | return 0; |
226 | } |
227 | |
228 | p += 4; |
229 | id1 = p[-1]; |
230 | id2 = p[0] & 0xf; |
231 | l = p[2] & 0x3f; |
232 | l += state->vbi_line_offset; |
233 | p += 4; |
234 | |
235 | switch (id2) { |
236 | case 1: |
237 | id2 = V4L2_SLICED_TELETEXT_B; |
238 | break; |
239 | case 4: |
240 | id2 = V4L2_SLICED_WSS_625; |
241 | break; |
242 | case 6: |
243 | id2 = V4L2_SLICED_CAPTION_525; |
244 | err = !odd_parity(c: p[0]) || !odd_parity(c: p[1]); |
245 | break; |
246 | case 9: |
247 | id2 = V4L2_SLICED_VPS; |
248 | if (decode_vps(dst: p, p) != 0) |
249 | err = 1; |
250 | break; |
251 | default: |
252 | id2 = 0; |
253 | err = 1; |
254 | break; |
255 | } |
256 | |
257 | vbi->type = err ? 0 : id2; |
258 | vbi->line = err ? 0 : l; |
259 | vbi->is_second_field = err ? 0 : (id1 == 0x55); |
260 | vbi->p = p; |
261 | return 0; |
262 | } |
263 | |