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saa7185.c
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1 /*
2  * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
3  *
4  * Copyright (C) 1998 Dave Perks <[email protected]>
5  *
6  * Slight changes for video timing and attachment output by
7  * Wolfgang Scherr <[email protected]>
8  *
9  * Changes by Ronald Bultje <[email protected]>
10  * - moved over to linux>=2.4.x i2c protocol (1/1/2003)
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25  */
26 
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/ioctl.h>
31 #include <asm/uaccess.h>
32 #include <linux/i2c.h>
33 #include <linux/videodev2.h>
34 #include <media/v4l2-device.h>
35 #include <media/v4l2-chip-ident.h>
36 
37 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
38 MODULE_AUTHOR("Dave Perks");
39 MODULE_LICENSE("GPL");
40 
41 static int debug;
42 module_param(debug, int, 0);
43 MODULE_PARM_DESC(debug, "Debug level (0-1)");
44 
45 
46 /* ----------------------------------------------------------------------- */
47 
48 struct saa7185 {
49  struct v4l2_subdev sd;
50  unsigned char reg[128];
51 
52  v4l2_std_id norm;
53 };
54 
55 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
56 {
57  return container_of(sd, struct saa7185, sd);
58 }
59 
60 /* ----------------------------------------------------------------------- */
61 
62 static inline int saa7185_read(struct v4l2_subdev *sd)
63 {
64  struct i2c_client *client = v4l2_get_subdevdata(sd);
65 
66  return i2c_smbus_read_byte(client);
67 }
68 
69 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
70 {
71  struct i2c_client *client = v4l2_get_subdevdata(sd);
72  struct saa7185 *encoder = to_saa7185(sd);
73 
74  v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
75  encoder->reg[reg] = value;
76  return i2c_smbus_write_byte_data(client, reg, value);
77 }
78 
79 static int saa7185_write_block(struct v4l2_subdev *sd,
80  const u8 *data, unsigned int len)
81 {
82  struct i2c_client *client = v4l2_get_subdevdata(sd);
83  struct saa7185 *encoder = to_saa7185(sd);
84  int ret = -1;
85  u8 reg;
86 
87  /* the adv7175 has an autoincrement function, use it if
88  * the adapter understands raw I2C */
89  if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
90  /* do raw I2C, not smbus compatible */
91  u8 block_data[32];
92  int block_len;
93 
94  while (len >= 2) {
95  block_len = 0;
96  block_data[block_len++] = reg = data[0];
97  do {
98  block_data[block_len++] =
99  encoder->reg[reg++] = data[1];
100  len -= 2;
101  data += 2;
102  } while (len >= 2 && data[0] == reg && block_len < 32);
103  ret = i2c_master_send(client, block_data, block_len);
104  if (ret < 0)
105  break;
106  }
107  } else {
108  /* do some slow I2C emulation kind of thing */
109  while (len >= 2) {
110  reg = *data++;
111  ret = saa7185_write(sd, reg, *data++);
112  if (ret < 0)
113  break;
114  len -= 2;
115  }
116  }
117 
118  return ret;
119 }
120 
121 /* ----------------------------------------------------------------------- */
122 
123 static const unsigned char init_common[] = {
124  0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
125  * YUV2C=1, MY2C=1, MUV2C=1 */
126 
127  0x42, 0x6b, /* OVLY0=107 */
128  0x43, 0x00, /* OVLU0=0 white */
129  0x44, 0x00, /* OVLV0=0 */
130  0x45, 0x22, /* OVLY1=34 */
131  0x46, 0xac, /* OVLU1=172 yellow */
132  0x47, 0x0e, /* OVLV1=14 */
133  0x48, 0x03, /* OVLY2=3 */
134  0x49, 0x1d, /* OVLU2=29 cyan */
135  0x4a, 0xac, /* OVLV2=172 */
136  0x4b, 0xf0, /* OVLY3=240 */
137  0x4c, 0xc8, /* OVLU3=200 green */
138  0x4d, 0xb9, /* OVLV3=185 */
139  0x4e, 0xd4, /* OVLY4=212 */
140  0x4f, 0x38, /* OVLU4=56 magenta */
141  0x50, 0x47, /* OVLV4=71 */
142  0x51, 0xc1, /* OVLY5=193 */
143  0x52, 0xe3, /* OVLU5=227 red */
144  0x53, 0x54, /* OVLV5=84 */
145  0x54, 0xa3, /* OVLY6=163 */
146  0x55, 0x54, /* OVLU6=84 blue */
147  0x56, 0xf2, /* OVLV6=242 */
148  0x57, 0x90, /* OVLY7=144 */
149  0x58, 0x00, /* OVLU7=0 black */
150  0x59, 0x00, /* OVLV7=0 */
151 
152  0x5a, 0x00, /* CHPS=0 */
153  0x5b, 0x76, /* GAINU=118 */
154  0x5c, 0xa5, /* GAINV=165 */
155  0x5d, 0x3c, /* BLCKL=60 */
156  0x5e, 0x3a, /* BLNNL=58 */
157  0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
158  0x60, 0x00, /* NULL */
159 
160  /* 0x61 - 0x66 set according to norm */
161 
162  0x67, 0x00, /* 0 : caption 1st byte odd field */
163  0x68, 0x00, /* 0 : caption 2nd byte odd field */
164  0x69, 0x00, /* 0 : caption 1st byte even field */
165  0x6a, 0x00, /* 0 : caption 2nd byte even field */
166 
167  0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
168  0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
169  * CBLF=0, ORCV2=0, PRCV2=0 */
170  0x6d, 0x00, /* SRCM1=0, CCEN=0 */
171 
172  0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
173  * least for PAL */
174  0x6f, 0x00, /* HTRIG upper bits */
175  0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
176 
177  /* The following should not be needed */
178 
179  0x71, 0x15, /* BMRQ=0x115 */
180  0x72, 0x90, /* EMRQ=0x690 */
181  0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
182  0x74, 0x00, /* NULL */
183  0x75, 0x00, /* NULL */
184  0x76, 0x00, /* NULL */
185  0x77, 0x15, /* BRCV=0x115 */
186  0x78, 0x90, /* ERCV=0x690 */
187  0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
188 
189  /* Field length controls */
190 
191  0x7a, 0x70, /* FLC=0 */
192 
193  /* The following should not be needed if SBLN = 1 */
194 
195  0x7b, 0x16, /* FAL=22 */
196  0x7c, 0x35, /* LAL=244 */
197  0x7d, 0x20, /* LAL=244, FAL=22 */
198 };
199 
200 static const unsigned char init_pal[] = {
201  0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
202  * YGS=1, INPI=0, DOWN=0 */
203  0x62, 0xc8, /* DECTYP=1, BSTA=72 */
204  0x63, 0xcb, /* FSC0 */
205  0x64, 0x8a, /* FSC1 */
206  0x65, 0x09, /* FSC2 */
207  0x66, 0x2a, /* FSC3 */
208 };
209 
210 static const unsigned char init_ntsc[] = {
211  0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
212  * YGS=1, INPI=0, DOWN=0 */
213  0x62, 0xe6, /* DECTYP=1, BSTA=102 */
214  0x63, 0x1f, /* FSC0 */
215  0x64, 0x7c, /* FSC1 */
216  0x65, 0xf0, /* FSC2 */
217  0x66, 0x21, /* FSC3 */
218 };
219 
220 
221 static int saa7185_init(struct v4l2_subdev *sd, u32 val)
222 {
223  struct saa7185 *encoder = to_saa7185(sd);
224 
225  saa7185_write_block(sd, init_common, sizeof(init_common));
226  if (encoder->norm & V4L2_STD_NTSC)
227  saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
228  else
229  saa7185_write_block(sd, init_pal, sizeof(init_pal));
230  return 0;
231 }
232 
233 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
234 {
235  struct saa7185 *encoder = to_saa7185(sd);
236 
237  if (std & V4L2_STD_NTSC)
238  saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
239  else if (std & V4L2_STD_PAL)
240  saa7185_write_block(sd, init_pal, sizeof(init_pal));
241  else
242  return -EINVAL;
243  encoder->norm = std;
244  return 0;
245 }
246 
247 static int saa7185_s_routing(struct v4l2_subdev *sd,
248  u32 input, u32 output, u32 config)
249 {
250  struct saa7185 *encoder = to_saa7185(sd);
251 
252  /* RJ: input = 0: input is from SA7111
253  input = 1: input is from ZR36060 */
254 
255  switch (input) {
256  case 0:
257  /* turn off colorbar */
258  saa7185_write(sd, 0x3a, 0x0f);
259  /* Switch RTCE to 1 */
260  saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
261  saa7185_write(sd, 0x6e, 0x01);
262  break;
263 
264  case 1:
265  /* turn off colorbar */
266  saa7185_write(sd, 0x3a, 0x0f);
267  /* Switch RTCE to 0 */
268  saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
269  /* SW: a slight sync problem... */
270  saa7185_write(sd, 0x6e, 0x00);
271  break;
272 
273  case 2:
274  /* turn on colorbar */
275  saa7185_write(sd, 0x3a, 0x8f);
276  /* Switch RTCE to 0 */
277  saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
278  /* SW: a slight sync problem... */
279  saa7185_write(sd, 0x6e, 0x01);
280  break;
281 
282  default:
283  return -EINVAL;
284  }
285  return 0;
286 }
287 
288 static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
289 {
290  struct i2c_client *client = v4l2_get_subdevdata(sd);
291 
292  return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0);
293 }
294 
295 /* ----------------------------------------------------------------------- */
296 
297 static const struct v4l2_subdev_core_ops saa7185_core_ops = {
298  .g_chip_ident = saa7185_g_chip_ident,
299  .init = saa7185_init,
300 };
301 
302 static const struct v4l2_subdev_video_ops saa7185_video_ops = {
303  .s_std_output = saa7185_s_std_output,
304  .s_routing = saa7185_s_routing,
305 };
306 
307 static const struct v4l2_subdev_ops saa7185_ops = {
308  .core = &saa7185_core_ops,
309  .video = &saa7185_video_ops,
310 };
311 
312 
313 /* ----------------------------------------------------------------------- */
314 
315 static int saa7185_probe(struct i2c_client *client,
316  const struct i2c_device_id *id)
317 {
318  int i;
319  struct saa7185 *encoder;
320  struct v4l2_subdev *sd;
321 
322  /* Check if the adapter supports the needed features */
323  if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
324  return -ENODEV;
325 
326  v4l_info(client, "chip found @ 0x%x (%s)\n",
327  client->addr << 1, client->adapter->name);
328 
329  encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
330  if (encoder == NULL)
331  return -ENOMEM;
332  encoder->norm = V4L2_STD_NTSC;
333  sd = &encoder->sd;
334  v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
335 
336  i = saa7185_write_block(sd, init_common, sizeof(init_common));
337  if (i >= 0)
338  i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
339  if (i < 0)
340  v4l2_dbg(1, debug, sd, "init error %d\n", i);
341  else
342  v4l2_dbg(1, debug, sd, "revision 0x%x\n",
343  saa7185_read(sd) >> 5);
344  return 0;
345 }
346 
347 static int saa7185_remove(struct i2c_client *client)
348 {
349  struct v4l2_subdev *sd = i2c_get_clientdata(client);
350  struct saa7185 *encoder = to_saa7185(sd);
351 
352  v4l2_device_unregister_subdev(sd);
353  /* SW: output off is active */
354  saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
355  kfree(encoder);
356  return 0;
357 }
358 
359 /* ----------------------------------------------------------------------- */
360 
361 static const struct i2c_device_id saa7185_id[] = {
362  { "saa7185", 0 },
363  { }
364 };
365 MODULE_DEVICE_TABLE(i2c, saa7185_id);
366 
367 static struct i2c_driver saa7185_driver = {
368  .driver = {
369  .owner = THIS_MODULE,
370  .name = "saa7185",
371  },
372  .probe = saa7185_probe,
373  .remove = saa7185_remove,
374  .id_table = saa7185_id,
375 };
376 
377 module_i2c_driver(saa7185_driver);
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