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
23MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
24MODULE_AUTHOR("Dave Perks");
25MODULE_LICENSE("GPL");
26
27static int debug;
28module_param(debug, int, 0);
29MODULE_PARM_DESC(debug, "Debug level (0-1)");
30
31
32/* ----------------------------------------------------------------------- */
33
34struct saa7185 {
35 struct v4l2_subdev sd;
36 unsigned char reg[128];
37
38 v4l2_std_id norm;
39};
40
41static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
42{
43 return container_of(sd, struct saa7185, sd);
44}
45
46/* ----------------------------------------------------------------------- */
47
48static 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
55static 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
65static 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
109static 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
186static 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
196static 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
207static 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
219static 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
233static 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
276static const struct v4l2_subdev_core_ops saa7185_core_ops = {
277 .init = saa7185_init,
278};
279
280static 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
285static const struct v4l2_subdev_ops saa7185_ops = {
286 .core = &saa7185_core_ops,
287 .video = &saa7185_video_ops,
288};
289
290
291/* ----------------------------------------------------------------------- */
292
293static 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
324static 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
336static const struct i2c_device_id saa7185_id[] = {
337 { "saa7185", 0 },
338 { }
339};
340MODULE_DEVICE_TABLE(i2c, saa7185_id);
341
342static 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
351module_i2c_driver(saa7185_driver);
352

source code of linux/drivers/media/i2c/saa7185.c