1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * saa7185 - Philips SAA7185B video encoder driver version 0.0.3 |
4 | * |
5 | * Copyright (C) 1998 Dave Perks <dperks@ibm.net> |
6 | * |
7 | * Slight changes for video timing and attachment output by |
8 | * Wolfgang Scherr <scherr@net4you.net> |
9 | * |
10 | * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> |
11 | * - moved over to linux>=2.4.x i2c protocol (1/1/2003) |
12 | */ |
13 | |
14 | #include <linux/module.h> |
15 | #include <linux/types.h> |
16 | #include <linux/slab.h> |
17 | #include <linux/ioctl.h> |
18 | #include <linux/uaccess.h> |
19 | #include <linux/i2c.h> |
20 | #include <linux/videodev2.h> |
21 | #include <media/v4l2-device.h> |
22 | |
23 | MODULE_DESCRIPTION("Philips SAA7185 video encoder driver" ); |
24 | MODULE_AUTHOR("Dave Perks" ); |
25 | MODULE_LICENSE("GPL" ); |
26 | |
27 | static int debug; |
28 | module_param(debug, int, 0); |
29 | MODULE_PARM_DESC(debug, "Debug level (0-1)" ); |
30 | |
31 | |
32 | /* ----------------------------------------------------------------------- */ |
33 | |
34 | struct saa7185 { |
35 | struct v4l2_subdev sd; |
36 | unsigned char reg[128]; |
37 | |
38 | v4l2_std_id norm; |
39 | }; |
40 | |
41 | static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd) |
42 | { |
43 | return container_of(sd, struct saa7185, sd); |
44 | } |
45 | |
46 | /* ----------------------------------------------------------------------- */ |
47 | |
48 | static inline int saa7185_read(struct v4l2_subdev *sd) |
49 | { |
50 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
51 | |
52 | return i2c_smbus_read_byte(client); |
53 | } |
54 | |
55 | static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value) |
56 | { |
57 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
58 | struct saa7185 *encoder = to_saa7185(sd); |
59 | |
60 | v4l2_dbg(1, debug, sd, "%02x set to %02x\n" , reg, value); |
61 | encoder->reg[reg] = value; |
62 | return i2c_smbus_write_byte_data(client, command: reg, value); |
63 | } |
64 | |
65 | static int saa7185_write_block(struct v4l2_subdev *sd, |
66 | const u8 *data, unsigned int len) |
67 | { |
68 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
69 | struct saa7185 *encoder = to_saa7185(sd); |
70 | int ret = -1; |
71 | u8 reg; |
72 | |
73 | /* the adv7175 has an autoincrement function, use it if |
74 | * the adapter understands raw I2C */ |
75 | if (i2c_check_functionality(adap: client->adapter, I2C_FUNC_I2C)) { |
76 | /* do raw I2C, not smbus compatible */ |
77 | u8 block_data[32]; |
78 | int block_len; |
79 | |
80 | while (len >= 2) { |
81 | block_len = 0; |
82 | block_data[block_len++] = reg = data[0]; |
83 | do { |
84 | block_data[block_len++] = |
85 | encoder->reg[reg++] = data[1]; |
86 | len -= 2; |
87 | data += 2; |
88 | } while (len >= 2 && data[0] == reg && block_len < 32); |
89 | ret = i2c_master_send(client, buf: block_data, count: block_len); |
90 | if (ret < 0) |
91 | break; |
92 | } |
93 | } else { |
94 | /* do some slow I2C emulation kind of thing */ |
95 | while (len >= 2) { |
96 | reg = *data++; |
97 | ret = saa7185_write(sd, reg, value: *data++); |
98 | if (ret < 0) |
99 | break; |
100 | len -= 2; |
101 | } |
102 | } |
103 | |
104 | return ret; |
105 | } |
106 | |
107 | /* ----------------------------------------------------------------------- */ |
108 | |
109 | static const unsigned char init_common[] = { |
110 | 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1, |
111 | * YUV2C=1, MY2C=1, MUV2C=1 */ |
112 | |
113 | 0x42, 0x6b, /* OVLY0=107 */ |
114 | 0x43, 0x00, /* OVLU0=0 white */ |
115 | 0x44, 0x00, /* OVLV0=0 */ |
116 | 0x45, 0x22, /* OVLY1=34 */ |
117 | 0x46, 0xac, /* OVLU1=172 yellow */ |
118 | 0x47, 0x0e, /* OVLV1=14 */ |
119 | 0x48, 0x03, /* OVLY2=3 */ |
120 | 0x49, 0x1d, /* OVLU2=29 cyan */ |
121 | 0x4a, 0xac, /* OVLV2=172 */ |
122 | 0x4b, 0xf0, /* OVLY3=240 */ |
123 | 0x4c, 0xc8, /* OVLU3=200 green */ |
124 | 0x4d, 0xb9, /* OVLV3=185 */ |
125 | 0x4e, 0xd4, /* OVLY4=212 */ |
126 | 0x4f, 0x38, /* OVLU4=56 magenta */ |
127 | 0x50, 0x47, /* OVLV4=71 */ |
128 | 0x51, 0xc1, /* OVLY5=193 */ |
129 | 0x52, 0xe3, /* OVLU5=227 red */ |
130 | 0x53, 0x54, /* OVLV5=84 */ |
131 | 0x54, 0xa3, /* OVLY6=163 */ |
132 | 0x55, 0x54, /* OVLU6=84 blue */ |
133 | 0x56, 0xf2, /* OVLV6=242 */ |
134 | 0x57, 0x90, /* OVLY7=144 */ |
135 | 0x58, 0x00, /* OVLU7=0 black */ |
136 | 0x59, 0x00, /* OVLV7=0 */ |
137 | |
138 | 0x5a, 0x00, /* CHPS=0 */ |
139 | 0x5b, 0x76, /* GAINU=118 */ |
140 | 0x5c, 0xa5, /* GAINV=165 */ |
141 | 0x5d, 0x3c, /* BLCKL=60 */ |
142 | 0x5e, 0x3a, /* BLNNL=58 */ |
143 | 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */ |
144 | 0x60, 0x00, /* NULL */ |
145 | |
146 | /* 0x61 - 0x66 set according to norm */ |
147 | |
148 | 0x67, 0x00, /* 0 : caption 1st byte odd field */ |
149 | 0x68, 0x00, /* 0 : caption 2nd byte odd field */ |
150 | 0x69, 0x00, /* 0 : caption 1st byte even field */ |
151 | 0x6a, 0x00, /* 0 : caption 2nd byte even field */ |
152 | |
153 | 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */ |
154 | 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0, |
155 | * CBLF=0, ORCV2=0, PRCV2=0 */ |
156 | 0x6d, 0x00, /* SRCM1=0, CCEN=0 */ |
157 | |
158 | 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at |
159 | * least for PAL */ |
160 | 0x6f, 0x00, /* HTRIG upper bits */ |
161 | 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */ |
162 | |
163 | /* The following should not be needed */ |
164 | |
165 | 0x71, 0x15, /* BMRQ=0x115 */ |
166 | 0x72, 0x90, /* EMRQ=0x690 */ |
167 | 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */ |
168 | 0x74, 0x00, /* NULL */ |
169 | 0x75, 0x00, /* NULL */ |
170 | 0x76, 0x00, /* NULL */ |
171 | 0x77, 0x15, /* BRCV=0x115 */ |
172 | 0x78, 0x90, /* ERCV=0x690 */ |
173 | 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */ |
174 | |
175 | /* Field length controls */ |
176 | |
177 | 0x7a, 0x70, /* FLC=0 */ |
178 | |
179 | /* The following should not be needed if SBLN = 1 */ |
180 | |
181 | 0x7b, 0x16, /* FAL=22 */ |
182 | 0x7c, 0x35, /* LAL=244 */ |
183 | 0x7d, 0x20, /* LAL=244, FAL=22 */ |
184 | }; |
185 | |
186 | static const unsigned char init_pal[] = { |
187 | 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1, |
188 | * YGS=1, INPI=0, DOWN=0 */ |
189 | 0x62, 0xc8, /* DECTYP=1, BSTA=72 */ |
190 | 0x63, 0xcb, /* FSC0 */ |
191 | 0x64, 0x8a, /* FSC1 */ |
192 | 0x65, 0x09, /* FSC2 */ |
193 | 0x66, 0x2a, /* FSC3 */ |
194 | }; |
195 | |
196 | static const unsigned char init_ntsc[] = { |
197 | 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1, |
198 | * YGS=1, INPI=0, DOWN=0 */ |
199 | 0x62, 0xe6, /* DECTYP=1, BSTA=102 */ |
200 | 0x63, 0x1f, /* FSC0 */ |
201 | 0x64, 0x7c, /* FSC1 */ |
202 | 0x65, 0xf0, /* FSC2 */ |
203 | 0x66, 0x21, /* FSC3 */ |
204 | }; |
205 | |
206 | |
207 | static int saa7185_init(struct v4l2_subdev *sd, u32 val) |
208 | { |
209 | struct saa7185 *encoder = to_saa7185(sd); |
210 | |
211 | saa7185_write_block(sd, data: init_common, len: sizeof(init_common)); |
212 | if (encoder->norm & V4L2_STD_NTSC) |
213 | saa7185_write_block(sd, data: init_ntsc, len: sizeof(init_ntsc)); |
214 | else |
215 | saa7185_write_block(sd, data: init_pal, len: sizeof(init_pal)); |
216 | return 0; |
217 | } |
218 | |
219 | static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) |
220 | { |
221 | struct saa7185 *encoder = to_saa7185(sd); |
222 | |
223 | if (std & V4L2_STD_NTSC) |
224 | saa7185_write_block(sd, data: init_ntsc, len: sizeof(init_ntsc)); |
225 | else if (std & V4L2_STD_PAL) |
226 | saa7185_write_block(sd, data: init_pal, len: sizeof(init_pal)); |
227 | else |
228 | return -EINVAL; |
229 | encoder->norm = std; |
230 | return 0; |
231 | } |
232 | |
233 | static int saa7185_s_routing(struct v4l2_subdev *sd, |
234 | u32 input, u32 output, u32 config) |
235 | { |
236 | struct saa7185 *encoder = to_saa7185(sd); |
237 | |
238 | /* RJ: input = 0: input is from SA7111 |
239 | input = 1: input is from ZR36060 */ |
240 | |
241 | switch (input) { |
242 | case 0: |
243 | /* turn off colorbar */ |
244 | saa7185_write(sd, reg: 0x3a, value: 0x0f); |
245 | /* Switch RTCE to 1 */ |
246 | saa7185_write(sd, reg: 0x61, value: (encoder->reg[0x61] & 0xf7) | 0x08); |
247 | saa7185_write(sd, reg: 0x6e, value: 0x01); |
248 | break; |
249 | |
250 | case 1: |
251 | /* turn off colorbar */ |
252 | saa7185_write(sd, reg: 0x3a, value: 0x0f); |
253 | /* Switch RTCE to 0 */ |
254 | saa7185_write(sd, reg: 0x61, value: (encoder->reg[0x61] & 0xf7) | 0x00); |
255 | /* SW: a slight sync problem... */ |
256 | saa7185_write(sd, reg: 0x6e, value: 0x00); |
257 | break; |
258 | |
259 | case 2: |
260 | /* turn on colorbar */ |
261 | saa7185_write(sd, reg: 0x3a, value: 0x8f); |
262 | /* Switch RTCE to 0 */ |
263 | saa7185_write(sd, reg: 0x61, value: (encoder->reg[0x61] & 0xf7) | 0x08); |
264 | /* SW: a slight sync problem... */ |
265 | saa7185_write(sd, reg: 0x6e, value: 0x01); |
266 | break; |
267 | |
268 | default: |
269 | return -EINVAL; |
270 | } |
271 | return 0; |
272 | } |
273 | |
274 | /* ----------------------------------------------------------------------- */ |
275 | |
276 | static const struct v4l2_subdev_core_ops saa7185_core_ops = { |
277 | .init = saa7185_init, |
278 | }; |
279 | |
280 | static const struct v4l2_subdev_video_ops saa7185_video_ops = { |
281 | .s_std_output = saa7185_s_std_output, |
282 | .s_routing = saa7185_s_routing, |
283 | }; |
284 | |
285 | static const struct v4l2_subdev_ops saa7185_ops = { |
286 | .core = &saa7185_core_ops, |
287 | .video = &saa7185_video_ops, |
288 | }; |
289 | |
290 | |
291 | /* ----------------------------------------------------------------------- */ |
292 | |
293 | static int saa7185_probe(struct i2c_client *client) |
294 | { |
295 | int i; |
296 | struct saa7185 *encoder; |
297 | struct v4l2_subdev *sd; |
298 | |
299 | /* Check if the adapter supports the needed features */ |
300 | if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
301 | return -ENODEV; |
302 | |
303 | v4l_info(client, "chip found @ 0x%x (%s)\n" , |
304 | client->addr << 1, client->adapter->name); |
305 | |
306 | encoder = devm_kzalloc(dev: &client->dev, size: sizeof(*encoder), GFP_KERNEL); |
307 | if (encoder == NULL) |
308 | return -ENOMEM; |
309 | encoder->norm = V4L2_STD_NTSC; |
310 | sd = &encoder->sd; |
311 | v4l2_i2c_subdev_init(sd, client, ops: &saa7185_ops); |
312 | |
313 | i = saa7185_write_block(sd, data: init_common, len: sizeof(init_common)); |
314 | if (i >= 0) |
315 | i = saa7185_write_block(sd, data: init_ntsc, len: sizeof(init_ntsc)); |
316 | if (i < 0) |
317 | v4l2_dbg(1, debug, sd, "init error %d\n" , i); |
318 | else |
319 | v4l2_dbg(1, debug, sd, "revision 0x%x\n" , |
320 | saa7185_read(sd) >> 5); |
321 | return 0; |
322 | } |
323 | |
324 | static void saa7185_remove(struct i2c_client *client) |
325 | { |
326 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
327 | struct saa7185 *encoder = to_saa7185(sd); |
328 | |
329 | v4l2_device_unregister_subdev(sd); |
330 | /* SW: output off is active */ |
331 | saa7185_write(sd, reg: 0x61, value: (encoder->reg[0x61]) | 0x40); |
332 | } |
333 | |
334 | /* ----------------------------------------------------------------------- */ |
335 | |
336 | static const struct i2c_device_id saa7185_id[] = { |
337 | { "saa7185" , 0 }, |
338 | { } |
339 | }; |
340 | MODULE_DEVICE_TABLE(i2c, saa7185_id); |
341 | |
342 | static struct i2c_driver saa7185_driver = { |
343 | .driver = { |
344 | .name = "saa7185" , |
345 | }, |
346 | .probe = saa7185_probe, |
347 | .remove = saa7185_remove, |
348 | .id_table = saa7185_id, |
349 | }; |
350 | |
351 | module_i2c_driver(saa7185_driver); |
352 | |