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1 | /* | |
2 | * saa7185 - Philips SAA7185B video encoder driver version 0.0.3 | |
3 | * | |
4 | * Copyright (C) 1998 Dave Perks <dperks@ibm.net> | |
5 | * | |
6 | * Slight changes for video timing and attachment output by | |
7 | * Wolfgang Scherr <scherr@net4you.net> | |
8 | * | |
9 | * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> | |
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/init.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/fs.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/major.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/mm.h> | |
36 | #include <linux/signal.h> | |
37 | #include <linux/types.h> | |
38 | #include <linux/i2c.h> | |
39 | #include <asm/io.h> | |
40 | #include <asm/pgtable.h> | |
41 | #include <asm/page.h> | |
42 | #include <asm/uaccess.h> | |
43 | ||
44 | #include <linux/videodev.h> | |
45 | #include <linux/video_encoder.h> | |
46 | ||
47 | MODULE_DESCRIPTION("Philips SAA7185 video encoder driver"); | |
48 | MODULE_AUTHOR("Dave Perks"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
51 | ||
52 | #define I2C_NAME(s) (s)->name | |
53 | ||
54 | ||
55 | static int debug = 0; | |
56 | module_param(debug, int, 0); | |
57 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); | |
58 | ||
59 | #define dprintk(num, format, args...) \ | |
60 | do { \ | |
61 | if (debug >= num) \ | |
62 | printk(format, ##args); \ | |
63 | } while (0) | |
64 | ||
65 | /* ----------------------------------------------------------------------- */ | |
66 | ||
67 | struct saa7185 { | |
68 | unsigned char reg[128]; | |
69 | ||
70 | int norm; | |
71 | int enable; | |
72 | int bright; | |
73 | int contrast; | |
74 | int hue; | |
75 | int sat; | |
76 | }; | |
77 | ||
78 | #define I2C_SAA7185 0x88 | |
79 | ||
80 | /* ----------------------------------------------------------------------- */ | |
81 | ||
82 | static inline int | |
83 | saa7185_read (struct i2c_client *client) | |
84 | { | |
85 | return i2c_smbus_read_byte(client); | |
86 | } | |
87 | ||
88 | static int | |
89 | saa7185_write (struct i2c_client *client, | |
90 | u8 reg, | |
91 | u8 value) | |
92 | { | |
93 | struct saa7185 *encoder = i2c_get_clientdata(client); | |
94 | ||
95 | dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value); | |
96 | encoder->reg[reg] = value; | |
97 | return i2c_smbus_write_byte_data(client, reg, value); | |
98 | } | |
99 | ||
100 | static int | |
101 | saa7185_write_block (struct i2c_client *client, | |
102 | const u8 *data, | |
103 | unsigned int len) | |
104 | { | |
105 | int ret = -1; | |
106 | u8 reg; | |
107 | ||
108 | /* the adv7175 has an autoincrement function, use it if | |
109 | * the adapter understands raw I2C */ | |
110 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { | |
111 | /* do raw I2C, not smbus compatible */ | |
112 | struct saa7185 *encoder = i2c_get_clientdata(client); | |
113 | u8 block_data[32]; | |
114 | int block_len; | |
115 | ||
116 | while (len >= 2) { | |
117 | block_len = 0; | |
118 | block_data[block_len++] = reg = data[0]; | |
119 | do { | |
120 | block_data[block_len++] = | |
121 | encoder->reg[reg++] = data[1]; | |
122 | len -= 2; | |
123 | data += 2; | |
124 | } while (len >= 2 && data[0] == reg && | |
125 | block_len < 32); | |
126 | if ((ret = i2c_master_send(client, block_data, | |
127 | block_len)) < 0) | |
128 | break; | |
129 | } | |
130 | } else { | |
131 | /* do some slow I2C emulation kind of thing */ | |
132 | while (len >= 2) { | |
133 | reg = *data++; | |
134 | if ((ret = saa7185_write(client, reg, | |
135 | *data++)) < 0) | |
136 | break; | |
137 | len -= 2; | |
138 | } | |
139 | } | |
140 | ||
141 | return ret; | |
142 | } | |
143 | ||
144 | /* ----------------------------------------------------------------------- */ | |
145 | ||
146 | static const unsigned char init_common[] = { | |
147 | 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1, | |
148 | * YUV2C=1, MY2C=1, MUV2C=1 */ | |
149 | ||
150 | 0x42, 0x6b, /* OVLY0=107 */ | |
151 | 0x43, 0x00, /* OVLU0=0 white */ | |
152 | 0x44, 0x00, /* OVLV0=0 */ | |
153 | 0x45, 0x22, /* OVLY1=34 */ | |
154 | 0x46, 0xac, /* OVLU1=172 yellow */ | |
155 | 0x47, 0x0e, /* OVLV1=14 */ | |
156 | 0x48, 0x03, /* OVLY2=3 */ | |
157 | 0x49, 0x1d, /* OVLU2=29 cyan */ | |
158 | 0x4a, 0xac, /* OVLV2=172 */ | |
159 | 0x4b, 0xf0, /* OVLY3=240 */ | |
160 | 0x4c, 0xc8, /* OVLU3=200 green */ | |
161 | 0x4d, 0xb9, /* OVLV3=185 */ | |
162 | 0x4e, 0xd4, /* OVLY4=212 */ | |
163 | 0x4f, 0x38, /* OVLU4=56 magenta */ | |
164 | 0x50, 0x47, /* OVLV4=71 */ | |
165 | 0x51, 0xc1, /* OVLY5=193 */ | |
166 | 0x52, 0xe3, /* OVLU5=227 red */ | |
167 | 0x53, 0x54, /* OVLV5=84 */ | |
168 | 0x54, 0xa3, /* OVLY6=163 */ | |
169 | 0x55, 0x54, /* OVLU6=84 blue */ | |
170 | 0x56, 0xf2, /* OVLV6=242 */ | |
171 | 0x57, 0x90, /* OVLY7=144 */ | |
172 | 0x58, 0x00, /* OVLU7=0 black */ | |
173 | 0x59, 0x00, /* OVLV7=0 */ | |
174 | ||
175 | 0x5a, 0x00, /* CHPS=0 */ | |
176 | 0x5b, 0x76, /* GAINU=118 */ | |
177 | 0x5c, 0xa5, /* GAINV=165 */ | |
178 | 0x5d, 0x3c, /* BLCKL=60 */ | |
179 | 0x5e, 0x3a, /* BLNNL=58 */ | |
180 | 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */ | |
181 | 0x60, 0x00, /* NULL */ | |
182 | ||
183 | /* 0x61 - 0x66 set according to norm */ | |
184 | ||
185 | 0x67, 0x00, /* 0 : caption 1st byte odd field */ | |
186 | 0x68, 0x00, /* 0 : caption 2nd byte odd field */ | |
187 | 0x69, 0x00, /* 0 : caption 1st byte even field */ | |
188 | 0x6a, 0x00, /* 0 : caption 2nd byte even field */ | |
189 | ||
190 | 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */ | |
191 | 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0, | |
192 | * CBLF=0, ORCV2=0, PRCV2=0 */ | |
193 | 0x6d, 0x00, /* SRCM1=0, CCEN=0 */ | |
194 | ||
195 | 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at | |
196 | * least for PAL */ | |
197 | 0x6f, 0x00, /* HTRIG upper bits */ | |
198 | 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */ | |
199 | ||
200 | /* The following should not be needed */ | |
201 | ||
202 | 0x71, 0x15, /* BMRQ=0x115 */ | |
203 | 0x72, 0x90, /* EMRQ=0x690 */ | |
204 | 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */ | |
205 | 0x74, 0x00, /* NULL */ | |
206 | 0x75, 0x00, /* NULL */ | |
207 | 0x76, 0x00, /* NULL */ | |
208 | 0x77, 0x15, /* BRCV=0x115 */ | |
209 | 0x78, 0x90, /* ERCV=0x690 */ | |
210 | 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */ | |
211 | ||
212 | /* Field length controls */ | |
213 | ||
214 | 0x7a, 0x70, /* FLC=0 */ | |
215 | ||
216 | /* The following should not be needed if SBLN = 1 */ | |
217 | ||
218 | 0x7b, 0x16, /* FAL=22 */ | |
219 | 0x7c, 0x35, /* LAL=244 */ | |
220 | 0x7d, 0x20, /* LAL=244, FAL=22 */ | |
221 | }; | |
222 | ||
223 | static const unsigned char init_pal[] = { | |
224 | 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1, | |
225 | * YGS=1, INPI=0, DOWN=0 */ | |
226 | 0x62, 0xc8, /* DECTYP=1, BSTA=72 */ | |
227 | 0x63, 0xcb, /* FSC0 */ | |
228 | 0x64, 0x8a, /* FSC1 */ | |
229 | 0x65, 0x09, /* FSC2 */ | |
230 | 0x66, 0x2a, /* FSC3 */ | |
231 | }; | |
232 | ||
233 | static const unsigned char init_ntsc[] = { | |
234 | 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1, | |
235 | * YGS=1, INPI=0, DOWN=0 */ | |
236 | 0x62, 0xe6, /* DECTYP=1, BSTA=102 */ | |
237 | 0x63, 0x1f, /* FSC0 */ | |
238 | 0x64, 0x7c, /* FSC1 */ | |
239 | 0x65, 0xf0, /* FSC2 */ | |
240 | 0x66, 0x21, /* FSC3 */ | |
241 | }; | |
242 | ||
243 | static int | |
244 | saa7185_command (struct i2c_client *client, | |
245 | unsigned int cmd, | |
246 | void *arg) | |
247 | { | |
248 | struct saa7185 *encoder = i2c_get_clientdata(client); | |
249 | ||
250 | switch (cmd) { | |
251 | ||
252 | case 0: | |
253 | saa7185_write_block(client, init_common, | |
254 | sizeof(init_common)); | |
255 | switch (encoder->norm) { | |
256 | ||
257 | case VIDEO_MODE_NTSC: | |
258 | saa7185_write_block(client, init_ntsc, | |
259 | sizeof(init_ntsc)); | |
260 | break; | |
261 | ||
262 | case VIDEO_MODE_PAL: | |
263 | saa7185_write_block(client, init_pal, | |
264 | sizeof(init_pal)); | |
265 | break; | |
266 | } | |
267 | ||
268 | break; | |
269 | ||
270 | case ENCODER_GET_CAPABILITIES: | |
271 | { | |
272 | struct video_encoder_capability *cap = arg; | |
273 | ||
274 | cap->flags = | |
275 | VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC | | |
276 | VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR; | |
277 | cap->inputs = 1; | |
278 | cap->outputs = 1; | |
279 | } | |
280 | break; | |
281 | ||
282 | case ENCODER_SET_NORM: | |
283 | { | |
284 | int *iarg = arg; | |
285 | ||
286 | //saa7185_write_block(client, init_common, sizeof(init_common)); | |
287 | ||
288 | switch (*iarg) { | |
289 | ||
290 | case VIDEO_MODE_NTSC: | |
291 | saa7185_write_block(client, init_ntsc, | |
292 | sizeof(init_ntsc)); | |
293 | break; | |
294 | ||
295 | case VIDEO_MODE_PAL: | |
296 | saa7185_write_block(client, init_pal, | |
297 | sizeof(init_pal)); | |
298 | break; | |
299 | ||
300 | case VIDEO_MODE_SECAM: | |
301 | default: | |
302 | return -EINVAL; | |
303 | ||
304 | } | |
305 | encoder->norm = *iarg; | |
306 | } | |
307 | break; | |
308 | ||
309 | case ENCODER_SET_INPUT: | |
310 | { | |
311 | int *iarg = arg; | |
312 | ||
313 | /* RJ: *iarg = 0: input is from SA7111 | |
314 | *iarg = 1: input is from ZR36060 */ | |
315 | ||
316 | switch (*iarg) { | |
317 | ||
318 | case 0: | |
319 | /* Switch RTCE to 1 */ | |
320 | saa7185_write(client, 0x61, | |
321 | (encoder->reg[0x61] & 0xf7) | 0x08); | |
322 | saa7185_write(client, 0x6e, 0x01); | |
323 | break; | |
324 | ||
325 | case 1: | |
326 | /* Switch RTCE to 0 */ | |
327 | saa7185_write(client, 0x61, | |
328 | (encoder->reg[0x61] & 0xf7) | 0x00); | |
329 | /* SW: a slight sync problem... */ | |
330 | saa7185_write(client, 0x6e, 0x00); | |
331 | break; | |
332 | ||
333 | default: | |
334 | return -EINVAL; | |
335 | ||
336 | } | |
337 | } | |
338 | break; | |
339 | ||
340 | case ENCODER_SET_OUTPUT: | |
341 | { | |
342 | int *iarg = arg; | |
343 | ||
344 | /* not much choice of outputs */ | |
345 | if (*iarg != 0) { | |
346 | return -EINVAL; | |
347 | } | |
348 | } | |
349 | break; | |
350 | ||
351 | case ENCODER_ENABLE_OUTPUT: | |
352 | { | |
353 | int *iarg = arg; | |
354 | ||
355 | encoder->enable = !!*iarg; | |
356 | saa7185_write(client, 0x61, | |
357 | (encoder->reg[0x61] & 0xbf) | | |
358 | (encoder->enable ? 0x00 : 0x40)); | |
359 | } | |
360 | break; | |
361 | ||
362 | default: | |
363 | return -EINVAL; | |
364 | } | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | /* ----------------------------------------------------------------------- */ | |
370 | ||
371 | /* | |
372 | * Generic i2c probe | |
373 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
374 | */ | |
375 | static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END }; | |
376 | ||
377 | static unsigned short ignore = I2C_CLIENT_END; | |
378 | ||
379 | static struct i2c_client_address_data addr_data = { | |
380 | .normal_i2c = normal_i2c, | |
381 | .probe = &ignore, | |
382 | .ignore = &ignore, | |
383 | }; | |
384 | ||
385 | static struct i2c_driver i2c_driver_saa7185; | |
386 | ||
387 | static int | |
388 | saa7185_detect_client (struct i2c_adapter *adapter, | |
389 | int address, | |
390 | int kind) | |
391 | { | |
392 | int i; | |
393 | struct i2c_client *client; | |
394 | struct saa7185 *encoder; | |
395 | ||
396 | dprintk(1, | |
397 | KERN_INFO | |
398 | "saa7185.c: detecting saa7185 client on address 0x%x\n", | |
399 | address << 1); | |
400 | ||
401 | /* Check if the adapter supports the needed features */ | |
402 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
403 | return 0; | |
404 | ||
405 | client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); | |
406 | if (!client) | |
407 | return -ENOMEM; | |
408 | client->addr = address; | |
409 | client->adapter = adapter; | |
410 | client->driver = &i2c_driver_saa7185; | |
411 | strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client))); | |
412 | ||
413 | encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL); | |
414 | if (encoder == NULL) { | |
415 | kfree(client); | |
416 | return -ENOMEM; | |
417 | } | |
418 | encoder->norm = VIDEO_MODE_NTSC; | |
419 | encoder->enable = 1; | |
420 | i2c_set_clientdata(client, encoder); | |
421 | ||
422 | i = i2c_attach_client(client); | |
423 | if (i) { | |
424 | kfree(client); | |
425 | kfree(encoder); | |
426 | return i; | |
427 | } | |
428 | ||
429 | i = saa7185_write_block(client, init_common, sizeof(init_common)); | |
430 | if (i >= 0) { | |
431 | i = saa7185_write_block(client, init_ntsc, | |
432 | sizeof(init_ntsc)); | |
433 | } | |
434 | if (i < 0) { | |
435 | dprintk(1, KERN_ERR "%s_attach: init error %d\n", | |
436 | I2C_NAME(client), i); | |
437 | } else { | |
438 | dprintk(1, | |
439 | KERN_INFO | |
440 | "%s_attach: chip version %d at address 0x%x\n", | |
441 | I2C_NAME(client), saa7185_read(client) >> 5, | |
442 | client->addr << 1); | |
443 | } | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | static int | |
449 | saa7185_attach_adapter (struct i2c_adapter *adapter) | |
450 | { | |
451 | dprintk(1, | |
452 | KERN_INFO | |
453 | "saa7185.c: starting probe for adapter %s (0x%x)\n", | |
454 | I2C_NAME(adapter), adapter->id); | |
455 | return i2c_probe(adapter, &addr_data, &saa7185_detect_client); | |
456 | } | |
457 | ||
458 | static int | |
459 | saa7185_detach_client (struct i2c_client *client) | |
460 | { | |
461 | struct saa7185 *encoder = i2c_get_clientdata(client); | |
462 | int err; | |
463 | ||
464 | err = i2c_detach_client(client); | |
465 | if (err) { | |
466 | return err; | |
467 | } | |
468 | ||
469 | saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40); /* SW: output off is active */ | |
470 | //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */ | |
471 | ||
472 | kfree(encoder); | |
473 | kfree(client); | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
478 | /* ----------------------------------------------------------------------- */ | |
479 | ||
480 | static struct i2c_driver i2c_driver_saa7185 = { | |
481 | .driver = { | |
482 | .name = "saa7185", /* name */ | |
483 | }, | |
484 | ||
485 | .id = I2C_DRIVERID_SAA7185B, | |
486 | ||
487 | .attach_adapter = saa7185_attach_adapter, | |
488 | .detach_client = saa7185_detach_client, | |
489 | .command = saa7185_command, | |
490 | }; | |
491 | ||
492 | static int __init | |
493 | saa7185_init (void) | |
494 | { | |
495 | return i2c_add_driver(&i2c_driver_saa7185); | |
496 | } | |
497 | ||
498 | static void __exit | |
499 | saa7185_exit (void) | |
500 | { | |
501 | i2c_del_driver(&i2c_driver_saa7185); | |
502 | } | |
503 | ||
504 | module_init(saa7185_init); | |
505 | module_exit(saa7185_exit); |